#ifndef INCLUDE_MODE
  #define INCLUDE_MODE
  /* #define SUBMIT_ONLY */
  #define DEBUG_OUTPUT
  #define SAMPLE_CHECK I
#endif

#ifdef INCLUDE_MAIN

IN VO Solve()
{
  CIN( int , N , M );
  CIN( string , S );
  RollingHash<MP> rh{};
  int answer = -1;
  FOREQ( m , M , M + 1 ){
    int rest = m % N , q = m / N;
    if( q == 0 ){
      auto left_interval = rh.FixedLengthEncode( S , m );
      auto right_interval = rh.FixedLengthEncode( S , m , true );
      FOREQ( l , 0 , N - m ){
        int r = l + m - 1;
        if( left_interval[l] == right_interval[N - 1 - r] ){
          answer = 0;
          break;
        }
      }
    }
    if( answer == 0 ){
      break;
    }
    auto T = S + S;
    if( q <= 1 ){
      auto left_interval = rh.FixedLengthEncode( T , m );
      auto right_interval = rh.FixedLengthEncode( T , m , true );
      FOREQ( l , max( 0 , N - m + 1 ) , N * 2 - m ){
        int r = l + m - 1;
        if( left_interval[l] == right_interval[N * 2 - 1 - r] ){
          answer = 1;
        }
      }
    }
    if( answer == 1 ){
      continue;
    }
    T += S;
    auto left_interval = rh.FixedLengthEncode( T , rest + N );
    auto right_interval = rh.FixedLengthEncode( T , rest + N , true );
    FOR( l , 0 , N ){
      int r = l + rest + N - 1;
      if( left_interval[l] == right_interval[N * 3 - 1 - r] ){
        answer == -1 || answer > q + 1 ? answer = q + 1 : answer; 
      }
    }
  }
  RETURN( answer );
}
REPEAT_MAIN(2e5);

#else /* INCLUDE_MAIN */

#ifdef INCLUDE_SUB

/* COMPAREに使用。圧縮時は削除する。*/
MP Naive( const int& N , const int& M , const int& K , const bool& experiment = false )
{
  MP answer = 0;
  return answer;
}

/* COMPAREに使用。圧縮時は削除する。*/
MP Answer( const ll& N , const ll& M , const ll& K )
{
  MP answer = 0;
  return answer;
}

/* 圧縮時は中身だけ削除する。*/
IN VO Experiment()
{
  /* // 1変数
  CEXPR( int , bound , 10 );
  int N_min = 1 , N_max = bound;
  vector<decldecay_t(Naive(0))> naive1( N_max - N_min + 1 );
  FOREQ( N , N_min , N_max ){
    naive1[N-N_min] = Naive( N , true );
  }
  CERRNS( "N∈[",N_min,"--",N_max,"]: " , naive3[N] , "\n" }; */
  /* // 2変数
  CEXPR( int , bound , 10 );
  int N_min = 1 , N_max = bound;
  vector<vector<decldecay_t(Naive(0,0))>> naive2( N_max - N_min + 1 );
  FOREQ( N , N_min , N_max ){
    int M_min = 1 , M_max = bound;
    naive2[N-N_min].resize( M_max - M_min + 1 );
    FOREQ( M , M_min , M_max ){
      naive2[N-N_min][M-M_min] = Naive( N , M , true );
    }
    CERRNS( "N=",N,",M∈[",M_min,"--",M_max,"]: " , naive2[N-N_min] , "\n" );
  }
  CERRNS( "Inline: " , naive2 , "\n" ); */
  /* // 3変数
  CEXPR( int , bound , 10 );
  int N_min = 1 , N_max = bound;
  vector<vector<vector<decldecay_t(Naive(0,0,0))>>> naive3( N_max - N_min + 1 );
  FOREQ( N , N_min , N_max ){
    int M_min = 1 , M_max = bound;
    naive3[N-N_min].resize( M_max - M_min + 1 );
    FOREQ( M , M_min , M_max ){
      int K_min = 1 , K_max = bound;
      naive3[N-N_min][M-M_min].resize( K_max - K_min + 1 );
      FOREQ( K , K_min , K_max ){
  	naive3[N-N_min][M-M_min][K-K_min] = Naive( N , M , K , true );
      }
      CERRNS( "(N,M)=(",N,",",M,"),K∈[",K_min,"--",K_max,"]: " , naive3[N-N_min][M-M_min] , "\n" );
    }
  }
  CERRNS( "Inline: " ); FOREQ( N , N_min , N_max ){ CERRNS( naive3[N-N_min] , " \n"[N==N_max] ) }; */
}

/* 圧縮時は中身だけ削除する。*/
IN VO SmallTest()
{
  /* // 数
  CEXPR( int , bound , 10 );
  int N_min = 1 , N_max = bound;
  FOREQ( N , N_min , N_max ){
    int M_min = 1 , M_max = bound;
    FOREQ( M , M_min , M_max ){
      int K_min = 1 , K_max = bound;
      FOREQ( K , K_min , K_max ){
        COMPARE( N , M , K );
      }
    }
  } */
  /* // 配列
  CEXPR( int , bound , 10 );
  int N_min = 1 , N_max = bound;
  FOREQ( N , N_min , N_max ){
    int Ai_min = 1 , Ai_max = bound;
    vector<int> A_min( N , Ai_min ) , A_max( N , Ai_max ) , A = A_min;
    bool b = Ai_min <= Ai_max;
    while( b ){
      COMPARE( N , A );
      b = NextLoopEq( N , A_min , A_max , A );
    }
  } */
  /* // 順列
  CEXPR( int , bound , 10 );
  int N_min = 1 , N_max = bound;
  FOREQ( N , N_min , N_max ){
    vector<int> P = id<int>( N ); ++P;
    bool b = true;
    while( b ){
      COMPARE( N , P );
      b = next_permutation( P.begin() , P.end() );
    }
  } */
  /* // 文字列
  CEXPR( int , bound , 5 );
  CEXPR( int , letter_num , 26 );
  int N_min = 1 , N_max = bound;
  FOREQ( N , N_min , N_max ){
    vector<int> A_min( N ) , A_ulim( N , letter_num ) , A = A_min;
    bool b = true;
    while( b ){
      COMPARE( N , ArrayToString( A ) );
      b = NextLoopEq( N , A_min , A_ulim , A );
    }
  } */
  /* // グリッド
  CEXPR( int , bound , 4 );
  FOREQ( H , 1 , bound ){
    FOREQ( W , 1 , bound ){
      int power = 1 << ( H * W );
      FOR( p , 0 , power ){
        vector S( H , string( W , '.' ) );
        FOR( i , 0 , H ){
          FOR( j , 0 , W ){
            S[i][j] = "#."[( p >> ( i * W + j ) ) & 1];
          }
        }
        COMPARE( H , W , S );
      }
    }
  } */
  /* // グラフ
  CEXPR( int , colour , 2 );
  int N_min = 1 , N_max = 5;
  FOREQ( N , N_min , N_max ){
    int M_max = N * ( N - 1 ) / 2;
    int power = 1;
    REPEAT( M_max ){
      power *= colour;
    }
    FOR( p , 0 , power ){
      int p_copy = p;
      vector<vector<int>> edge{};
      FOR( i , 0 , N ){
        FOR( j , i + 1 , N ){
          int c = p_copy % colour;
          if( c > 0 ){
            if constexpr ( colour > 2 ){
              edge.push_back( { i , j , c } );
            } else {
              edge.push_back( { i , j } );
            }
          }
          p_copy /= colour;
        }
      }
      COMPARE( N , M , edge );
    }
  } */
  /* // 区間クエリ（上記生成コードに挿入して使う）
  int Q_max = 3;
  int N2 = N * ( N + 1 ) / 2;   int power = 1;
  FOR ( Q , 1 , Q_max ){
    power *= N2;
    FOR( p , 0 , power ){
      int p_copy = p;
      vector<T2<int>> query( Q );
      FOR( q , 0 , Q ){
        int r = p_copy % N2 , l = 0;
        while( r >= N - l ){
          r -= N - l++;
        }
        r += l;
        query[q] = {l+1,r+1};
        p_copy /= N2;
      }
      COMPARE( N , ... , Q , query );
    }
  } */
}

/* 圧縮時は中身だけ削除する。*/
IN VO RandomTest( const int& test_case_num )
{
  /* // 数
  REPEAT( test_case_num ){
    CEXPR( int , bound_N , 10 ); CIN_ASSERT( N , 1 , bound_N );
    CEXPR( ll , bound_M , 1000 ); CIN_ASSERT( M , 1 , bound_M );
    CEXPR( ll , bound_K , 100 ); CIN_ASSERT( K , 1 , bound_K );
    COMPARE( N , M , K );
  }*/
  /* // 配列
  REPEAT( test_case_num ){
    CEXPR( int , bound_N , 10 ); CIN_ASSERT( N , 1 , bound_N );
    CEXPR( int , bound_A , 1e5 ); vector<int> A( N );
    FOR( i , 0 , N ){ SET_ASSERT( A[i] , 1 , bound_A ); }
    COMPARE( N , A );
  } */
  /* // 順列
  REPEAT( test_case_num ){
    CEXPR( int , bound_N , 8 ); CIN_ASSERT( N , 1 , bound_N );
    vector<int> P = id<int>( N ); ++P;
    REPEAT( N ){
      int i = GetRand( 0 , N - 1 ) , j = GetRand( 0 , N - 1 ); swap( P[i] , P[j] );
    }
    COMPARE( N , P );
  } */
  /* // 文字列
  CEXPR( int , letter_num , 26 );
  REPEAT( test_case_num ){
    CEXPR( int , bound_N , 5 ); CIN_ASSERT( N , 1 , bound_N );
    vector<int> A( N ); FOR( i , 0 , N ){ SET_ASSERT( A[i] , 0 , letter_num - 1 ); }
    COMPARE( N , ArrayToString( A ) );
  } */
  /* // グリッド
  REPEAT( test_case_num ){
    CEXPR( int , bound_H , 10 ); CIN_ASSERT( H , 1 , bound_H );
    CEXPR( int , bound_W , 10 ); CIN_ASSERT( W , 1 , bound_W );
    vector S( H , string( W , '.' ) ); FOR( i , 0 , H ){ FOR( j , 0 , W ){ S[i][j] = "#."[GetRand( 0 , 1 )]; } }
    COMPARE( H , W , S );
  } */
  /* // グラフ
  CEXPR( int , bound_w , 0 );
  REPEAT( test_case_num ){
    CEXPR( int , bound_N , 10 ); CIN_ASSERT( N , 1 , bound_N );
    CEXPR( int , bound_M , bound_N * ( bound_N - 1 ) / 2 ); CIN_ASSERT( M , 1 , bound_M );
    vector found( N , vector<bool>( N ) );
    vector<vector<int>> edge{};
    edge.reserve( M );
    REPEAT( M ){
      int i = GetRand( 0 , N - 2 ) , j = GetRand( i , N - 1 );
      while( found[i][j] ){
        j == N - 1 ? j = ( i == N - 2 ? i = 0 : ++i ) + 1 : ++j;
      }
      found[i][j] = true;
      if constexpr( bound_w > 0 ){
        edge.push_back( { i , j , GetRand( 1 , bound_w ) } );
      } else {
        edge.push_back( { i , j } );
      }
    }
    COMPARE( N , M , edge );
  } */
  /* // クエリ（上記生成コードに挿入して使う）
  CEXPR( int , bound_Q , 10 ); CIN_ASSERT( Q , 1 , 10 );
  vector<vector<int>> query( Q );
  FOR( q , 0 , Q ){
    CIN_ASSERT( type , 1 , 2 );
    CIN_ASSERT( l , 1 , N - 1 );
    CIN_ASSERT( r , l+1 , N );
    if( type == 1 ){
      CIN_ASSERT( x , 1 , 10 );
      query[q] = {type,l,r,x};
    } else if( type == 2 ){
      query[q] = {type,l,r};
    }
  } */
}

#define INCLUDE_MAIN
#include __FILE__

#else /* INCLUDE_SUB */

#ifdef INCLUDE_LIBRARY

/*
- BFS (6KB)
  Geometry/Graph/Algorithm/BreadthFirstSearch/
  - AdicExhausiveSearch (11KB)
    Geometry/Graph/Algorithm/BreadthFirstSearch/AdicExhausiveSearch/
  - BitExhausiveSearch (10KB)
    Geometry/Graph/Algorithm/BreadthFirstSearch/BitExhausiveSearch/
  - ZeroOneBreadthFirstSearch (4KB)
    Geometry/Graph/Algorithm/BreadthFirstSearch/01/
- BIT (5KB)
  SetTheory/DirectProduct/AffineSpace/BIT/
  - IntervalAdd (9KB)
    SetTheory/DirectProduct/AffineSpace/BIT/IntervalAdd/
  - IntervalMax (9KB)
    SetTheory/DirectProduct/AffineSpace/BIT/IntervalMax/
- CoordinateCompress (3KB)
  SetTheory/DirectProduct/CoordinateCompress/
- DFS (6KB)
  Geometry/Graph/Algorithm/DepthFirstSearch/
  - Tree (11KB)
    Geometry/Graph/Algorithm/DepthFirstSearch/Tree/
- DifferenceSequence (9KB)
  SetTheory/DirectProduct/AffineSpace/DifferenceSequence/
  - TwoDimensional (5KB)
    SetTheory/DirectProduct/AffineSpace/DifferenceSequence/TwoDimensional/
- Dijkstra (6KB)
  Geometry/Graph/Algorithm/Dijkstra/
  - MinimumCostFlow (16KB)
    Geometry/Graph/Algorithm/Dijkstra/Potentialised/MinimumCostFlow/
- Divisor/Prime/Factorisation (4KB)
  Arithmetic/Divisor/
- Knapsack (8KB)
  Combinatorial/KnapsackProblem/
- LineSubset (7KB)
  SetTheory/Line/
  - NonNegative (15KB)
    SetTheory/Line/NonNegative/
  - Bounded (15KB)
    SetTheory/Line/Bounded/
  - Compressed (15KB)
    SetTheory/Line/Compressed/
- SqrtDecomposition
  - Monoid (5KB)
    SetTheory/DirectProduct/AffineSpace/SqrtDecomposition/Monoid/
  - CommutativeDual (6KB)
    SetTheory/DirectProduct/AffineSpace/SqrtDecomposition/Dual/Commutative/
  - IntervalMultiplyLazy (18KB)
    SetTheory/DirectProduct/AffineSpace/SqrtDecomposition/LazyEvaluation/IntervalMultiply/
- TruncatedPolynomial (31KB)
  Polynomial/Truncate/
  - NonProth (34KB)
    Polynomial/Truncate/NonProth/
- Matrix (6KB)
  LinearAlgebra/
  - TwoByTwo/TwoByOne (9KB)
    LinearAlgebra/TwoByOne/
  - Rank (3KB)
    LinearAlgebra/Rank/Mod/
- UnionFind (3KB)
  Geometry/Graph/Algorithm/UnionFindForest/
*/

/* VVV 常設でないライブラリは以下に挿入する。*/

#ifdef DEBUG
  #include "c:/Users/user/Documents/Programming/Utility/String/RollingHash/a_Body.hpp"
#else
TE <TY MODINT,TY INT = int>CL RollingHash{PU:INT m_SZ;MODINT m_r;MODINT m_r_inv;VE<MODINT> m_r_power;IN RollingHash();IN RollingHash(MODINT r);IN CO MODINT& r()CO NE;IN CO MODINT& r_inv()CO NE;IN CO VE<MODINT>& r_power()CO NE;US Code = tuple<MODINT,MODINT,INT>;TE <TY STR> IN Code Encode(CO STR& s,CO bool& reversed = false);TE <TY STR,TY Enum> Code Encode(CO STR& s,Enum& e,CO bool& reversed = false);TE <TY STR> IN Code CumulativeEncode(CO STR& s,CO bool& reversed = false);TE <TY STR,TY Enum> Code CumulativeEncode(CO STR& s,Enum& e,CO bool& reversed = false);TE <TY STR> IN VE<Code> PointwiseEncode(CO STR& s,CO bool& reversed = false);TE <TY STR,TY Enum> VE<Code> PointwiseEncode(CO STR& s,Enum& e,CO bool& reversed = false);TE <TY STR> IN VE<Code> FixedLengthEncode(CO STR& s,CRI LE,CO bool& reversed = false);TE <TY STR,TY Enum> VE<Code> FixedLengthEncode(CO STR& s,CRI LE,Enum& e,CO bool& reversed = false);TE <TY CHAR> IN Code Replace(Code code,CO INT& i,CO CHAR& c_prev,CO CHAR& c_next)CO;TE <TY CHAR,TY Enum> Code Replace(Code code,CO INT& i,CO CHAR& c_prev,CO CHAR& c_next,Enum& e)CO;TE <TY CHAR> IN Code PopFront(Code code,CO CHAR& c_prev)CO;TE <TY CHAR,TY Enum> Code PopFront(Code code,CO CHAR& c_prev,Enum& e)CO;TE <TY CHAR> IN Code PopBack(Code code,CO CHAR& c_prev)CO;TE <TY CHAR,TY Enum> Code PopBack(Code code,CO CHAR& c_prev,Enum& e)CO;TE <TY STR> IN INT CountContain(CO STR& s,CO Code& code,CO bool& reversed = false);TE <TY STR,TY Enum> INT CountContain(CO STR& s,CO Code& code,Enum& e,CO bool& reversed = false);ST IN Code Concatenate(Code code0,CO Code& code1);ST IN Code Fold(Code code,INT n);VO CheckSZ(CO INT& SZ);TE <TY CHAR> ST IN MODINT Enumeration(CO CHAR& c);};
TE <TY MODINT,TY INT> IN RollingHash<MODINT,INT>::RollingHash():RollingHash(GetRand(((MODINT{}- 1)/ 11).RP(),(MODINT{}- 1).RP())){}TE <TY MODINT,TY INT> IN RollingHash<MODINT,INT>::RollingHash(MODINT r):m_SZ(1),m_r(MO(r)),m_r_inv(m_r),m_r_power{1}{m_r_inv.Invert();}TE <TY MODINT,TY INT> IN CO MODINT& RollingHash<MODINT,INT>::r()CO NE{RE m_r;}TE <TY MODINT,TY INT> IN CO MODINT& RollingHash<MODINT,INT>::r_inv()CO NE{RE m_r_inv;}TE <TY MODINT,TY INT> IN CO VE<MODINT>& RollingHash<MODINT,INT>::r_power()CO NE{RE m_r_power;}TE <TY MODINT,TY INT> TE <TY STR> IN TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::Encode(CO STR& s,CO bool& reversed){RE Encode(s,Enumeration<decldecay_t(s[0])>,reversed);}TE <TY MODINT,TY INT> TE <TY STR,TY Enum>TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::Encode(CO STR& s,Enum& e,CO bool& reversed){ST_AS(is_invocable_r_v<MODINT,Enum,CO decldecay_t(s[0])&>);CO int SZ = s.SZ();CheckSZ(SZ + 1);MODINT AN = 0;for(int i = 0;i < SZ;i++){AN += e(s[reversed?SZ - 1 - i:i])* m_r_power[i];}RE{AN,m_r_power[SZ],SZ};}TE <TY MODINT,TY INT> TE <TY STR> IN TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::CumulativeEncode(CO STR& s,CO bool& reversed){RE CumulativeEncode(s,Enumeration<decldecay_t(s[0])>,reversed);}TE <TY MODINT,TY INT> TE <TY STR,TY Enum>TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::CumulativeEncode(CO STR& s,Enum& e,CO bool& reversed){ST_AS(is_invocable_r_v<MODINT,Enum,CO decldecay_t(s[0])&>);CO int SZ = s.SZ();CheckSZ(SZ + 1);TY RollingHash<MODINT,INT>::Code AN(SZ + 1);for(int i = 0;i < SZ;i++){AN[i+1]= Concatenate(AN[i],{e(s[reversed?SZ - 1 - i:i])* m_r_power[i],m_r,1});}RE AN;}TE <TY MODINT,TY INT> TE <TY STR> IN VE<TY RollingHash<MODINT,INT>::Code> RollingHash<MODINT,INT>::PointwiseEncode(CO STR& s,CO bool& reversed){RE PointwiseEncode(s,Enumeration<decldecay_t(s[0])>,reversed);}TE <TY MODINT,TY INT> TE <TY STR,TY Enum>VE<TY RollingHash<MODINT,INT>::Code> RollingHash<MODINT,INT>::PointwiseEncode(CO STR& s,Enum& e,CO bool& reversed){ST_AS(is_invocable_r_v<MODINT,Enum,CO decldecay_t(s[0])&>);CO int SZ = s.SZ();CheckSZ(SZ + 1);VE<TY RollingHash<MODINT,INT>::Code> AN(SZ);for(int i = 0;i < SZ;i++){AN[i]={e(s[reversed?SZ - 1 - i:i]),m_r,1};}RE AN;}TE <TY MODINT,TY INT> TE <TY STR> IN VE<TY RollingHash<MODINT,INT>::Code> RollingHash<MODINT,INT>::FixedLengthEncode(CO STR& s,CRI LE,CO bool& reversed){RE FixedLengthEncode(s,LE,Enumeration<decldecay_t(s[0])>,reversed);}TE <TY MODINT,TY INT> TE <TY STR,TY Enum>VE<TY RollingHash<MODINT,INT>::Code> RollingHash<MODINT,INT>::FixedLengthEncode(CO STR& s,CRI LE,Enum& e,CO bool& reversed){ST_AS(is_invocable_r_v<MODINT,Enum,CO decldecay_t(s[0])&>);CO int SZ = s.SZ();CheckSZ(SZ + 1);VE<TY RollingHash<MODINT,INT>::Code> AN(LE <= SZ?SZ - LE + 1:0,{MODINT{},m_r_power[LE],1});if(LE <= SZ){for(int i = 0;i < SZ;i++){get<0>(AN[0])+= e(s[reversed?SZ - 1 - i:i])* m_r_power[i];}CO int SZ_shifted = SZ - LE;for(int i = 1;i < SZ_shifted;i++){get<0>(AN[i])= get<0>(AN[i-1])- e(s[reversed?SZ - i:i - 1])* m_r_power[i-1]+ e(s[reversed?SZ - i - LE:i - 1 + LE])* m_r_power[i-1+LE];}}RE AN;}TE <TY MODINT,TY INT> TE <TY CHAR> IN TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::Replace(TY RollingHash<MODINT,INT>::Code code,CO INT& i,CO CHAR& c_prev,CO CHAR& c_next)CO{RE Replace(MO(code),i,c_prev,c_next,Enumeration<CHAR>);}TE <TY MODINT,TY INT> TE <TY CHAR,TY Enum>TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::Replace(TY RollingHash<MODINT,INT>::Code code,CO INT& i,CO CHAR& c_prev,CO CHAR& c_next,Enum& e)CO{auto&[h,p,s]= code;AS(i < s);h +=(e(c_next)-= e(c_prev))*=(i < m_SZ?m_r_power[i]:R_PW(m_r,i));RE MO(code);}TE <TY MODINT,TY INT> TE <TY CHAR> IN TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::PopFront(TY RollingHash<MODINT,INT>::Code code,CO CHAR& c_prev)CO{RE PopFront(MO(code),c_prev,Enumeration<CHAR>);}TE <TY MODINT,TY INT> TE <TY CHAR,TY Enum>TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::PopFront(TY RollingHash<MODINT,INT>::Code code,CO CHAR& c_prev,Enum& e)CO{auto&[h,p,s]= code;AS(s-- > 0);h -= e(c_prev)*(s < m_SZ?m_r_power[s]:R_PW(m_r,s));r *= m_r_inv;RE MO(code);}TE <TY MODINT,TY INT> TE <TY CHAR> IN TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::PopBack(TY RollingHash<MODINT,INT>::Code code,CO CHAR& c_prev)CO{RE PopBack(MO(code),c_prev,Enumeration<CHAR>);}TE <TY MODINT,TY INT> TE <TY CHAR,TY Enum>TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::PopBack(TY RollingHash<MODINT,INT>::Code code,CO CHAR& c_prev,Enum& e)CO{auto&[h,p,s]= code;AS(s-- > 0);(h -= e(c_prev)* m_r_power[0])*= m_r_inv;r *= m_r_inv;RE MO(code);}TE <TY MODINT,TY INT> TE <TY STR> IN INT RollingHash<MODINT,INT>::CountContain(CO STR& s,CO TY RollingHash<MODINT,INT>::Code& code,CO bool& reversed){RE CountContain(s,code,Enumeration<decldecay_t(s[0])>,reversed);}TE <TY MODINT,TY INT> TE <TY STR,TY Enum>INT RollingHash<MODINT,INT>::CountContain(CO STR& s,CO TY RollingHash<MODINT,INT>::Code& code,Enum& e,CO bool& reversed){ST_AS(is_invocable_r_v<MODINT,Enum,CO decldecay_t(s[0])&>);CO INT SZ0 = s.SZ();CheckSZ(SZ0);CO MODINT& n = get<0>(code);CO INT& SZ1 = get<2>(code);if(SZ1 == 0){RE 1;}CheckSZ(SZ1);CO MODINT& r_power = m_r_power[SZ1 - 1];INT AN = 0;MODINT temp = 0;for(INT i = 0;i < SZ0;i++){(i < SZ1?temp += e(s[reversed?SZ0 - 1 - i:i])* m_r_power[i]:((temp -= e(s[reversed?SZ0 + SZ1 - 1 - i:i - SZ1]))*= m_r_inv)+= e(s[reversed?SZ0 - 1 - i:i])* r_power)== n?++AN:AN;}RE AN;}TE <TY MODINT,TY INT> IN TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::Concatenate(TY RollingHash<MODINT,INT>::Code code0,CO TY RollingHash<MODINT,INT>::Code& code1){auto&[h,p,s]= code0;h += get<0>(code1)* p;p *= get<1>(code1);s += get<2>(code1);RE MO(code0);}TE <TY MODINT,TY INT> IN TY RollingHash<MODINT,INT>::Code RollingHash<MODINT,INT>::Fold(TY RollingHash<MODINT,INT>::Code code,INT n){AS(n >= 0);TY RollingHash<MODINT,INT>::Code AN{0,1,0};auto&[h,p,s]= code;WH(n > 0){(n & 1)== 1?AN = Concatenate(MO(AN),code):AN;h *= p + 1;p *= p;s += s;n >>= 1;}RE AN;}TE <TY MODINT,TY INT> VO RollingHash<MODINT,INT>::CheckSZ(CO INT& SZ){m_r_power.reserve(SZ);WH(m_SZ < SZ){m_r_power.push_back(m_r_power[m_SZ++ - 1]* m_r);}}TE <TY MODINT,TY INT> TE <TY CHAR> IN MODINT RollingHash<MODINT,INT>::Enumeration(CO CHAR& c){RE MODINT{c};}
#endif

/* AAA 常設でないライブラリは以上に挿入する。*/

#define INCLUDE_SUB
#include __FILE__

#else /* INCLUDE_LIBRARY */

#ifdef DEBUG
  #define _GLIBCXX_DEBUG
#else
  #pragma GCC optimize ( "O3" )
  #pragma GCC optimize ( "unroll-loops" )
  #pragma GCC target ( "sse4.2,fma,avx2,popcnt,lzcnt,bmi2" )
  #define REPEAT_MAIN( BOUND ) START_MAIN; CEXPR( int , bound_test_case_num , BOUND ); int test_case_num = 1; if CE( bound_test_case_num > 1 ){ SET_ASSERT( test_case_num , 1 , bound_test_case_num ); } FINISH_MAIN
  #define FINISH_MAIN REPEAT( test_case_num ){ if CE( bound_test_case_num > 1 ){ CERR( "testcase " , VARIABLE_FOR_REPEAT_test_case_num , ":" ); } Solve(); CERR( "" ); } }
  #define DEXPR( LL , BOUND , VALUE1 , VALUE2 ) CEXPR( LL , BOUND , VALUE1 )
  #define ASSERT( A , MIN , MAX ) AS( ( MIN ) <= A && A <= ( MAX ) )
  #ifdef USE_GETLINE
    #define GETLINE_SEPARATE( SEPARATOR , ... ) string __VA_ARGS__; VariadicGetline( cin , SEPARATOR , __VA_ARGS__ )
    #define GETLINE( ... ) GETLINE_SEPARATE( '\n' , __VA_ARGS__ )
    #define SET_LL( A ) { GETLINE( A ## _str ); A = stoll( A ## _str ); }
  #else
    #define CIN( LL , ... ) LL __VA_ARGS__; VariadicCin( cin , __VA_ARGS__ )
    #define SET_A( I , N , ... ) VariadicResize( N + I , __VA_ARGS__ ); FOR( VARIABLE_FOR_SET_A , 0 , N ){ VariadicSet( cin , VARIABLE_FOR_SET_A + I , __VA_ARGS__ ); }
    #define CIN_A( LL , I , N , ... ) VE<LL> __VA_ARGS__; SET_A( I , N , __VA_ARGS__ )
    #define CIN_AA( LL , I0 , N0 , I1 , N1 , VAR ) VE<VE<LL>> VAR( N0 + I0 ); FOR( VARIABLE_FOR_CIN_AA , 0 , N0 ){ SET_A( I1 , N1 , VAR[VARIABLE_FOR_CIN_AA + I0] ); }
    #define SET_LL( A ) cin >> A
  #endif
  #define SET_ASSERT( A , MIN , MAX ) SET_LL( A ); ASSERT( A , MIN , MAX )
  #define SOLVE_ONLY 
  #define COUT( ... ) VariadicCout( cout , __VA_ARGS__ ) << ENDL
  #define COUTNS( ... ) VariadicCoutNonSep( cout , __VA_ARGS__ )
  #define CERR( ... ) 
  #define CERRNS( ... ) 
  #define COUT_A( I , N , A ) CoutArray( cout , I , N , A ) << ENDL
  #define CERR_A( I , N , A ) 
#endif
#ifdef REACTIVE
  #ifdef DEBUG
    #define RSET( A , ... ) A = __VA_ARGS__
  #else
    #define RSET( A , ... ) cin >> A
  #endif
  #define RCIN( LL , A , ... ) LL A; RSET( A , __VA_ARGS__ )
  #define ENDL endl
#else
  #define ENDL "\n"
#endif
#include <bits/stdc++.h>
using namespace std;
#define ATT __attribute__( ( target( "sse4.2,fma,avx2,popcnt,lzcnt,bmi2" ) ) )
#define START_MAIN int main(){ ios_base::sync_with_stdio( false ); cin.tie( nullptr )
#define START_WATCH chrono::system_clock::time_point watch = chrono::system_clock::now(); double loop_average_time = 0.0 , loop_start_time = 0.0 , current_time = 0.0; int loop_count = 0
#define CURRENT_TIME ( current_time = static_cast<double>( chrono::duration_cast<chrono::microseconds>( chrono::system_clock::now() - watch ).count() / 1000.0 ) )
#define CHECK_WATCH( TL_MS ) ( CURRENT_TIME , loop_count == 0 ? loop_start_time = current_time : loop_average_time = ( current_time - loop_start_time ) / loop_count , ++loop_count , current_time < TL_MS - loop_average_time * 2 - 100.0 )
#define CEXPR( LL , BOUND , VALUE ) CE LL BOUND = VALUE
#define SET_A_ASSERT( I , N , A , MIN , MAX ) FOR( VARIABLE_FOR_SET_A , 0 , N ){ SET_ASSERT( A[VARIABLE_FOR_SET_A + I] , MIN , MAX ); }
#define SET_AA_ASSERT( I0 , N0 , I1 , N1 , A , MIN , MAX ) FOR( VARIABLE_FOR_SET_AA0 , 0 , N0 ){ FOR( VARIABLE_FOR_SET_AA1 , 0 , N1 ){ SET_ASSERT( A[VARIABLE_FOR_SET_AA0 + I0][VARIABLE_FOR_SET_AA1 + I1] , MIN , MAX ); } }
#define CIN_ASSERT( A , MIN , MAX ) decldecay_t( MAX ) A; SET_ASSERT( A , MIN , MAX )
#define CIN_A_ASSERT( I , N , A , MIN , MAX ) vector<decldecay_t( MAX )> A( N + I ); SET_A_ASSERT( I , N , A , MIN , MAX )
#define CIN_AA_ASSERT( I0 , N0 , I1 , N1 , A , MIN , MAX ) vector A( N0 + I0 , vector<decldecay_t( MAX )>( N1 + I1 ) ); SET_AA_ASSERT( I0 , N0 , I1 , N1 , A , MIN , MAX )
#define OUTPUT_ARRAY( C , I , N , A ) FOR( VARIABLE_FOR_OUTPUT_ARRAY , I , N ){ C << A[VARIABLE_FOR_OUTPUT_ARRAY] << " \n"[VARIABLE_FOR_OUTPUT_ARRAY==(N)-1]; }
#define FOR( VAR , INITIAL , FINAL_PLUS_ONE ) for( decldecay_t( FINAL_PLUS_ONE ) VAR = INITIAL ; VAR < FINAL_PLUS_ONE ; VAR ++ )
#define FOREQ( VAR , INITIAL , FINAL ) for( decldecay_t( FINAL ) VAR = INITIAL ; VAR <= FINAL ; VAR ++ )
#define FOREQINV( VAR , INITIAL , FINAL ) for( decldecay_t( INITIAL ) VAR = INITIAL ; VAR + 1 > FINAL ; VAR -- )
#define ITR( ARRAY ) auto begin_ ## ARRAY = ARRAY .BE() , itr_ ## ARRAY = begin_ ## ARRAY , end_ ## ARRAY = ARRAY .EN()
#define FOR_ITR( ARRAY ) for( ITR( ARRAY ) , itr = itr_ ## ARRAY ; itr_ ## ARRAY != end_ ## ARRAY ; itr_ ## ARRAY ++ , itr++ )
#define RUN( ARRAY , ... ) for( auto&& __VA_ARGS__ : ARRAY )
#define REPEAT( HOW_MANY_TIMES ) FOR( VARIABLE_FOR_REPEAT_ ## HOW_MANY_TIMES , 0 , HOW_MANY_TIMES )
#define SET_PRECISION( DECIMAL_DIGITS ) cout << fixed << setprecision( DECIMAL_DIGITS ); cerr << fixed << setprecision( DECIMAL_DIGITS )
#define RETURN( ... ) SOLVE_ONLY; COUT( __VA_ARGS__ ); RE
#define COMPARE( ... ) auto naive = Naive( __VA_ARGS__ , true ); auto answer = Answer( __VA_ARGS__ ); bool match = naive == answer; CERR( "(" , #__VA_ARGS__ , ") == (" , __VA_ARGS__ , ") : Naive == " , naive , match ? "==" : "!=" , answer , "== Answer" ); if( !match ){ RE; }

/* 圧縮用 */
#define TE template
#define TY typename
#define US using
#define ST static
#define AS assert
#define IN inline
#define CL class
#define PU public
#define OP operator
#define CE constexpr
#define CO const
#define NE noexcept
#define RE return 
#define WH while
#define VO void
#define VE vector
#define LI list
#define BE begin
#define EN end
#define SZ size
#define LE length
#define PW Power
#define MO move
#define TH this
#define CRI CO int&
#define CRUI CO uint&
#define CRL CO ll&
#define VI virtual 
#define IS basic_istream<char,Traits>
#define OS basic_ostream<char,Traits>
#define ST_AS static_assert
#define reMO_CO remove_const
#define is_COructible_v is_constructible_v
#define rBE rbegin
#define reSZ resize

/* 型のエイリアス */
#define decldecay_t(VAR)decay_t<decltype(VAR)>
TE <TY F,TY...Args> US ret_t = decltype(declval<F>()(declval<Args>()...));
TE <TY T> US inner_t = TY T::type;
US uint = unsigned int;
US ll = long long;
US ull = unsigned long long;
US ld = long double;
US lld = __float128;
TE <TY INT> US T2 = pair<INT,INT>;
TE <TY INT> US T3 = tuple<INT,INT,INT>;
TE <TY INT> US T4 = tuple<INT,INT,INT,INT>;
US path = pair<int,ll>;

#ifndef DEBUG
/* 二分探索用 */
/* EXPRESSIONがANSWERの広義単調関数の時、EXPRESSION >= CONST_TARGETの整数解を格納。*/
#define BS( ANSWER , MINIMUM , MAXIMUM , EXPRESSION , DESIRED_INEQUALITY , CONST_TARGET , INEQUALITY_FOR_CHECK , UPDATE_U , UPDATE_L , UPDATE_ANSWER ) \
  static_assert( ! is_same<decldecay_t( CONST_TARGET ),uint>::value && ! is_same<decldecay_t( CONST_TARGET ),ull>::value ); \
  ll ANSWER = MINIMUM;							\
  {									\
    ll ANSWER ## _L = MINIMUM;                                          \
    ll ANSWER ## _R = MAXIMUM;                                          \
    ANSWER = UPDATE_ANSWER;						\
    ll EXPRESSION_BS;							\
    const ll CONST_TARGET_BS = ( CONST_TARGET );			\
    ll DIFFERENCE_BS;							\
    while( ANSWER ## _L < ANSWER ## _R ){                               \
      DIFFERENCE_BS = ( EXPRESSION_BS = ( EXPRESSION ) ) - CONST_TARGET_BS; \
      CERR( "二分探索中:" , string{ #ANSWER } + "_L" , "=" , ANSWER ## _L , "<=" , #ANSWER , "=" , ANSWER , "<=" , ANSWER ## _R , "=" , string{ #ANSWER } + "_R" , ":" , #EXPRESSION , "=" , EXPRESSION_BS , DIFFERENCE_BS > 0 ? ">" : DIFFERENCE_BS < 0 ? "<" : "=" , CONST_TARGET_BS , "=" , #CONST_TARGET ); \
      if( DIFFERENCE_BS INEQUALITY_FOR_CHECK 0 ){			\
	ANSWER ## _R = UPDATE_U;                                        \
      } else {								\
	ANSWER ## _L = UPDATE_L;                                        \
      }									\
      ANSWER = UPDATE_ANSWER;						\
    }									\
    if( ANSWER ## _L > ANSWER ## _R ){                                  \
      CERR( "二分探索失敗:" , string{ #ANSWER } + "_L" , "=" , ANSWER ## _L , ">" , ANSWER ## _R , "=" , string{ #ANSWER } + "_R" , ":" , #ANSWER , ":=" , #MAXIMUM , "+ 1 =" , MAXIMUM + 1  ); \
      CERR( "二分探索マクロにミスがある可能性があります。変更前の版に戻してください。" ); \
      ANSWER = MAXIMUM + 1;						\
    } else {								\
      CERR( "二分探索終了:" , string{ #ANSWER } + "_L" , "=" , ANSWER ## _L , "<=" , #ANSWER , "=" , ANSWER , "<=" , ANSWER ## _R , "=" , string{ #ANSWER } + "_R" ); \
      CERR( "二分探索が成功したかを確認するために" , #EXPRESSION , "を計算します。" ); \
      CERR( "成功判定が不要な場合はこの計算を削除しても構いません。" );	\
      EXPRESSION_BS = ( EXPRESSION );					\
      CERR( "二分探索結果:" , #EXPRESSION , "=" , EXPRESSION_BS , ( EXPRESSION_BS > CONST_TARGET_BS ? ">" : EXPRESSION_BS < CONST_TARGET_BS ? "<" : "=" ) , CONST_TARGET_BS ); \
      if( EXPRESSION_BS DESIRED_INEQUALITY CONST_TARGET_BS ){		\
	CERR( "二分探索成功:" , #ANSWER , ":=" , ANSWER );		\
      } else {								\
	CERR( "二分探索失敗:" , #ANSWER , ":=" , #MAXIMUM , "+ 1 =" , MAXIMUM + 1 ); \
	CERR( "単調でないか、単調増加性と単調減少性を逆にしてしまったか、探索範囲内に解が存在しません。" ); \
	ANSWER = MAXIMUM + 1;						\
      }									\
    }									\
  }									\

/* 単調増加の時にEXPRESSION >= CONST_TARGETの最小解を格納。*/
#define BS1( ANSWER , MINIMUM , MAXIMUM , EXPRESSION , CONST_TARGET ) BS( ANSWER , MINIMUM , MAXIMUM , EXPRESSION , >= , CONST_TARGET , >= , ANSWER , ANSWER + 1 , ( ANSWER ## _L + ANSWER ## _R ) / 2 )
/* 単調増加の時にEXPRESSION <= CONST_TARGETの最大解を格納。*/
#define BS2( ANSWER , MINIMUM , MAXIMUM , EXPRESSION , CONST_TARGET ) BS( ANSWER , MINIMUM , MAXIMUM , EXPRESSION , <= , CONST_TARGET , > , ANSWER - 1 , ANSWER , ( ANSWER ## _L + 1 + ANSWER ## _R ) / 2 )
/* 単調減少の時にEXPRESSION >= CONST_TARGETの最大解を格納。*/
#define BS3( ANSWER , MINIMUM , MAXIMUM , EXPRESSION , CONST_TARGET ) BS( ANSWER , MINIMUM , MAXIMUM , EXPRESSION , >= , CONST_TARGET , < , ANSWER - 1 , ANSWER , ( ANSWER ## _L + 1 + ANSWER ## _R ) / 2 )
/* 単調減少の時にEXPRESSION <= CONST_TARGETの最小解を格納。*/
#define BS4( ANSWER , MINIMUM , MAXIMUM , EXPRESSION , CONST_TARGET ) BS( ANSWER , MINIMUM , MAXIMUM , EXPRESSION , <= , CONST_TARGET , <= , ANSWER , ANSWER + 1 , ( ANSWER ## _L + ANSWER ## _R ) / 2 )

/* 尺取り法用 */
/* VAR_TPAは尺取り法用の変数名の接頭辞で、実際の変数名ではなく、_Lと_Rと_infoがつく。 */
/* ANSWER ## _temp = {VAR_TPA ## _L,VAR_TPA ## _R,VPA_TPA ## _info}を       */
/* {INIT,INIT,INFO_init}で初期化する。VPA_TPA ## _infoは区間和など。            */
/* ANSWER ## _tempがCONTINUE_CONDITIONを満たす限り、ANSWER ## _tempが          */
/* 条件ON_CONDITIONを満たすか否かを判定し、それがtrueになるか                     */
/* VAR_TAR ## _LがVAR_TAR ## _Rに追い付くまでVAR_TPA ## _LとVPA_TPA ## _infoの */
/* 更新操作UPDATE_Lを繰り返し、その後VAR_TPA ## _RとVPA_TPA ## _infoの           */
/* 更新操作UPDATE_Rを行う。（マクロとコンマの制約上、関数オブジェクトを用いる）        */
/* ON_CONDITIONがtrueとなる極大閉区間とその時点でのinfoをANSWERに格納する。         */
/* 例えば長さNの非負整数値配列Aで極大な正値区間とそこでの総和を取得したい場合           */
/* auto update_L = [&]( int& i_L , ll& i_info ){                             */
/*   i_info -= A[i_L++];                                                     */
/* };                                                                        */
/* auto update_R = [&]( int& i_R , ll& i_info ){                             */
/*   ++i_R < N ? i_info += A[i_R] : i_info;                                  */
/* };                                                                        */
/* TPA( interval , i , 0 , i_R < N , update_L( i_L , i_info ) , update_R( i_R , i_info ) , A[i_L] > 0 && A[i_R] > 0 , ll( A[0] ) ); */
/* とすればtuple<int,int,ll>値配列intervalに{左端,右端,総和}の列が格納される。      */
#define TPA( ANSWER , VAR_TPA , INIT , CONTINUE_CONDITION , UPDATE_L , UPDATE_R , ON_CONDITION , INFO_init ) \
  vector<tuple<decldecay_t( INIT ),decldecay_t( INIT ),decldecay_t( INFO_init )>> ANSWER{}; \
  {									\
    auto init_TPA = INIT;						\
    decldecay_t( ANSWER.front() ) ANSWER ## _temp = { init_TPA , init_TPA , INFO_init }; \
    auto ANSWER ## _prev = ANSWER ## _temp;				\
    auto& VAR_TPA ## _L = get<0>( ANSWER ## _temp );			\
    auto& VAR_TPA ## _R = get<1>( ANSWER ## _temp );			\
    auto& VAR_TPA ## _info = get<2>( ANSWER ## _temp );			\
    bool on_TPA_prev = false;						\
    while( true ){                                                      \
      bool continuing = CONTINUE_CONDITION;				\
      bool on_TPA = continuing && ( ON_CONDITION );			\
      CERR( continuing ? "尺取り中" : "尺取り終了" , ": [L,R] = [" , VAR_TPA ## _L , "," , VAR_TPA ## _R , "] ," , on_TPA_prev ? "on" : "off" , "->" , on_TPA ? "on" : "off" , ", info =" , VAR_TPA ## _info ); \
      if( on_TPA_prev && ! on_TPA ){					\
	ANSWER.push_back( ANSWER ## _prev );				\
	CERR( #ANSWER , "に" , ANSWER ## _prev , "を格納します。" );	\
      }									\
      if( continuing ){							\
	if( on_TPA || VAR_TPA ## _L == VAR_TPA ## _R ){			\
	  ANSWER ## _prev = ANSWER ## _temp;				\
	  UPDATE_R;							\
	} else {							\
	  UPDATE_L;							\
	}								\
      } else {								\
	break;								\
      }									\
      on_TPA_prev = on_TPA;						\
    }									\
  }									\

#endif

/* データ構造用 */
TE <TY T> IN T Addition(CO T& t0,CO T& t1){RE t0 + t1;}
TE <TY T> IN T Xor(CO T& t0,CO T& t1){RE t0 ^ t1;}
TE <TY T> IN T MU(CO T& t0,CO T& t1){RE t0 * t1;}
TE <TY T> IN CO T& Zero(){ST CO T z{};RE z;}
TE <TY T> IN CO T& One(){ST CO T o = 1;RE o;}TE <TY T> IN T AdditionInv(CO T& t){RE -t;}
TE <TY T> IN T Id(CO T& v){RE v;}
TE <TY T> IN T Min(CO T& a,CO T& b){RE a < b?a:b;}
TE <TY T> IN T Max(CO T& a,CO T& b){RE a < b?b:a;}

/* VVV 常設ライブラリは以下に挿入する。*/
#ifdef DEBUG
  #include "C:/Users/user/Documents/Programming/Contest/Template/include/a_Body.hpp"
#else
/* Random (1KB)*/
ll GetRand(CRI Rand_min,CRI Rand_max){AS(Rand_min <= Rand_max);ll AN = time(NULL);RE AN * rand()%(Rand_max + 1 - Rand_min)+ Rand_min;}

/* Set (1KB)*/
#define DC_OF_HASH(...)struct hash<__VA_ARGS__>{IN size_t OP()(CO __VA_ARGS__& n)CO;};
CL is_ordered{PU:is_ordered()= delete;TE <TY T> ST CE auto Check(CO T& t)-> decltype(t < t,true_type());ST CE false_type Check(...);TE <TY T> ST CE CO bool value = is_same_v< decltype(Check(declval<T>())),true_type >;};
TE <TY T>US Set = conditional_t<is_COructible_v<unordered_set<T>>,unordered_set<T>,conditional_t<is_ordered::value<T>,set<T>,VO>>;

/* Tuple (4KB)*/
#define DF_OF_AR_FOR_TUPLE(OPR)TE <TY T,TY U,TE <TY...> TY V> IN auto OP OPR ## =(V<T,U>& t0,CO V<T,U>& t1)-> decltype((get<0>(t0),t0))&{get<0>(t0)OPR ## = get<0>(t1);get<1>(t0)OPR ## = get<1>(t1);RE t0;}TE <TY T,TY U,TY V> IN tuple<T,U,V>& OP OPR ## =(tuple<T,U,V>& t0,CO tuple<T,U,V>& t1){get<0>(t0)OPR ## = get<0>(t1);get<1>(t0)OPR ## = get<1>(t1);get<2>(t0)OPR ## = get<2>(t1);RE t0;}TE <TY T,TY U,TY V,TY W> IN tuple<T,U,V,W>& OP OPR ## =(tuple<T,U,V,W>& t0,CO tuple<T,U,V,W>& t1){get<0>(t0)OPR ## = get<0>(t1);get<1>(t0)OPR ## = get<1>(t1);get<2>(t0)OPR ## = get<2>(t1);get<3>(t0)OPR ## = get<3>(t1);RE t0;}TE <TY ARG,TY T,TY U,TE <TY...> TY V> IN auto OP OPR ## =(V<T,U>& t0,CO ARG& t1)-> decltype((get<0>(t0),t0))&{get<0>(t0)OPR ## = t1;get<1>(t0)OPR ## = t1;RE t0;}TE <TY ARG,TY T,TY U,TY V> IN tuple<T,U,V>& OP OPR ## =(tuple<T,U,V>& t0,CO ARG& t1){get<0>(t0)OPR ## = t1;get<1>(t0)OPR ## = t1;get<2>(t0)OPR ## = t1;RE t0;}TE <TY ARG,TY T,TY U,TY V,TY W> IN tuple<T,U,V,W>& OP OPR ## =(tuple<T,U,V,W>& t0,CO ARG& t1){get<0>(t0)OPR ## = t1;get<1>(t0)OPR ## = t1;get<2>(t0)OPR ## = t1;get<3>(t0)OPR ## = t1;RE t0;}TE <TE <TY...> TY V,TY...ARGS,TY ARG> IN auto OP OPR(CO V<ARGS...>& t0,CO ARG& t1)-> decldecay_t((get<0>(t0),t0)){auto t = t0;RE MO(t OPR ## = t1);}
#define DF_OF_INCREMENT_FOR_TUPLE(INCR)TE <TY T,TY U,TE <TY...> TY V> IN auto OP INCR(V<T,U>& t)-> decltype((get<0>(t),t))&{INCR get<0>(t);INCR get<1>(t);RE t;}TE <TY T,TY U,TY V> IN tuple<T,U,V>& OP INCR(tuple<T,U,V>& t){INCR get<0>(t);INCR get<1>(t);INCR get<2>(t);RE t;}TE <TY T,TY U,TY V,TY W> IN tuple<T,U,V,W>& OP INCR(tuple<T,U,V,W>& t){INCR get<0>(t);INCR get<1>(t);INCR get<2>(t);INCR get<3>(t);RE t;}
TE <CL Traits,TY T> IN IS& OP>>(IS& is,tuple<T>& arg){RE is >> get<0>(arg);}TE <CL Traits,TY T,TY U,TE <TY...> TY V> IN auto OP>>(IS& is,V<T,U>& arg)-> decltype((get<0>(arg),is))&{RE is >> get<0>(arg)>> get<1>(arg);}TE <CL Traits,TY T,TY U,TY V> IN IS& OP>>(IS& is,tuple<T,U,V>& arg){RE is >> get<0>(arg)>> get<1>(arg)>> get<2>(arg);}TE <CL Traits,TY T,TY U,TY V,TY W> IN IS& OP>>(IS& is,tuple<T,U,V,W>& arg){RE is >> get<0>(arg)>> get<1>(arg)>> get<2>(arg)>> get<3>(arg);}TE <CL Traits,TY T> IN OS& OP<<(OS& os,CO tuple<T>& arg){RE os << get<0>(arg);}TE <CL Traits,TY T,TY U,TE <TY...> TY V> IN auto OP<<(OS& os,CO V<T,U>& arg)-> decltype((get<0>(arg),os))&{RE os << get<0>(arg)<< " " << get<1>(arg);}TE <CL Traits,TY T,TY U,TY V> IN OS& OP<<(OS& os,CO tuple<T,U,V>& arg){RE os << get<0>(arg)<< " " << get<1>(arg)<< " " << get<2>(arg);}TE <CL Traits,TY T,TY U,TY V,TY W> IN OS& OP<<(OS& os,CO tuple<T,U,V,W>& arg){RE os << get<0>(arg)<< " " << get<1>(arg)<< " " << get<2>(arg)<< " " << get<3>(arg);}DF_OF_AR_FOR_TUPLE(+);DF_OF_AR_FOR_TUPLE(-);DF_OF_AR_FOR_TUPLE(*);DF_OF_AR_FOR_TUPLE(/);DF_OF_AR_FOR_TUPLE(%);DF_OF_INCREMENT_FOR_TUPLE(++);DF_OF_INCREMENT_FOR_TUPLE(--);

#define DF_OF_HASH_FOR_TUPLE(PAIR)TE <TY T,TY U> IN size_t hash<PAIR<T,U>>::OP()(CO PAIR<T,U>& n)CO{ST CO size_t seed =(GetRand(1e3,1e8)<< 1)| 1;ST CO hash<T> h0;ST CO hash<U> h1;RE(h0(get<0>(n))* seed)^ h1(get<1>(n));}
TE <TY T> DC_OF_HASH(tuple<T>);TE <TY T,TY U> DC_OF_HASH(pair<T,U>);TE <TY T,TY U> DC_OF_HASH(tuple<T,U>);TE <TY T,TY U,TY V> DC_OF_HASH(tuple<T,U,V>);TE <TY T,TY U,TY V,TY W> DC_OF_HASH(tuple<T,U,V,W>);
TE <TY T> IN size_t hash<tuple<T>>::OP()(CO tuple<T>& n)CO{ST CO hash<T> h;RE h(get<0>(n));}DF_OF_HASH_FOR_TUPLE(pair);DF_OF_HASH_FOR_TUPLE(tuple);TE <TY T,TY U,TY V> IN size_t hash<tuple<T,U,V>>::OP()(CO tuple<T,U,V>& n)CO{ST CO size_t seed =(GetRand(1e3,1e8)<< 1)| 1;ST CO hash<pair<T,U>> h01;ST CO hash<V> h2;RE(h01({get<0>(n),get<1>(n)})* seed)^ h2(get<2>(n));}TE <TY T,TY U,TY V,TY W> IN size_t hash<tuple<T,U,V,W>>::OP()(CO tuple<T,U,V,W>& n)CO{ST CO size_t seed =(GetRand(1e3,1e8)<< 1)| 1;ST CO hash<pair<T,U>> h01;ST CO hash<pair<V,W>> h23;RE(h01({get<0>(n),get<1>(n)})* seed)^ h23({get<2>(n),get<3>(n)});}

/* Vector (2KB)*/
#define DF_OF_COUT_FOR_VE(V)TE <CL Traits,TY Arg> IN OS& OP<<(OS& os,CO V<Arg>& arg){auto BE = arg.BE(),EN = arg.EN();auto IT = BE;WH(IT != EN){(IT == BE?os:os << " ")<< *IT;IT++;}RE os;}
#define DF_OF_AR_FOR_VE(V,OPR)TE <TY T> IN V<T>& OP OPR ## =(V<T>& a,CO T& t){for(auto& s:a){s OPR ## = t;}RE a;}TE <TY T> IN V<T>& OP OPR ## =(V<T>& a0,CO V<T>& a1){AS(a0.SZ()<= a1.SZ());auto IT0 = a0.BE(),EN0 = a0.EN();auto IT1 = a1.BE();WH(IT0 != EN0){*(IT0++)OPR ## = *(IT1++);}RE a0;}TE <TY T,TY U> IN V<T> OP OPR(V<T> a,CO U& u){RE MO(a OPR ## = u);}
#define DF_OF_INCREMENT_FOR_VE(V,INCR)TE <TY T> IN V<T>& OP INCR(V<T>& a){for(auto& i:a){INCR i;}RE a;}
#define DF_OF_ARS_FOR_VE(V)DF_OF_AR_FOR_VE(V,+);DF_OF_AR_FOR_VE(V,-);DF_OF_AR_FOR_VE(V,*);DF_OF_AR_FOR_VE(V,/);DF_OF_AR_FOR_VE(V,%);DF_OF_INCREMENT_FOR_VE(V,++);DF_OF_INCREMENT_FOR_VE(V,--);TE <TY T> IN V<T> OP*(CO T& scalar,V<T> v){for(auto& t:v){v *= t;}RE MO(v);}
DF_OF_COUT_FOR_VE(VE);DF_OF_COUT_FOR_VE(LI);DF_OF_COUT_FOR_VE(set);DF_OF_COUT_FOR_VE(unordered_set);DF_OF_ARS_FOR_VE(VE);DF_OF_ARS_FOR_VE(LI);IN VO VariadicResize(CRI SZ){}TE <TY Arg,TY... ARGS> IN VO VariadicResize(CRI SZ,Arg& arg,ARGS&... args){arg.resize(SZ);VariadicResize(SZ,args...);}TE <TY V> IN auto Get(V& a){RE[&](CRI i = 0)-> CO decldecay_t(a[0])&{RE a[i];};}TE <TY T = int> IN VE<T> id(CRI SZ){VE<T> AN(SZ);FOR(i,0,SZ){AN[i]= i;}RE AN;}TE <TY T> VO Sort(VE<T>& a,CO bool& reversed = false){if(reversed){ST auto comp =[](CO T& t0,CO T& t1){RE t1 < t0;};sort(a.BE(),a.EN(),comp);}else{sort(a.BE(),a.EN());}}TE <TY T> IN VE<int> IndexSort(CO VE<T>& a,CO bool& reversed = false){auto index = id<int>(a.SZ());if(reversed){sort(index.BE(),index.EN(),[&](CRI i,CRI j){RE a[j]< a[i];});}else{sort(index.BE(),index.EN(),[&](CRI i,CRI j){RE a[i]< a[j];});}RE index;}

/* Map (1KB)*/
#define DF_OF_AR_FOR_MAP(MAP,OPR)TE <TY T,TY U> IN MAP<T,U>& OP OPR ## =(MAP<T,U>& a,CO pair<T,U>& v){a[v.first]OPR ## = v.second;RE a;}TE <TY T,TY U> IN MAP<T,U>& OP OPR ## =(MAP<T,U>& a0,CO MAP<T,U>& a1){for(auto&[t,u]:a1){a0[t]OPR ## = u;}RE a0;}TE <TY T,TY U,TY ARG> IN MAP<T,U> OP OPR(MAP<T,U> a,CO ARG& arg){RE MO(a OPR ## = arg);}
#define DF_OF_ARS_FOR_MAP(MAP)DF_OF_AR_FOR_MAP(MAP,+);DF_OF_AR_FOR_MAP(MAP,-);DF_OF_AR_FOR_MAP(MAP,*);DF_OF_AR_FOR_MAP(MAP,/);DF_OF_AR_FOR_MAP(MAP,%);
TE <TY T,TY U>US Map = conditional_t<is_COructible_v<unordered_map<T,int>>,unordered_map<T,U>,conditional_t<is_ordered::value<T>,map<T,U>,VO>>;
DF_OF_ARS_FOR_MAP(map);DF_OF_ARS_FOR_MAP(unordered_map);

/* StdStream (2KB)*/
TE <CL Traits> IN IS& VariadicCin(IS& is){RE is;}TE <CL Traits,TY Arg,TY... ARGS> IN IS& VariadicCin(IS& is,Arg& arg,ARGS&... args){RE VariadicCin(is >> arg,args...);}TE <CL Traits> IN IS& VariadicSet(IS& is,CRI i){RE is;}TE <CL Traits,TY Arg,TY... ARGS> IN IS& VariadicSet(IS& is,CRI i,Arg& arg,ARGS&... args){RE VariadicSet(is >> arg[i],i,args...);}TE <CL Traits> IN IS& VariadicGetline(IS& is,CO char& separator){RE is;}TE <CL Traits,TY Arg,TY... ARGS> IN IS& VariadicGetline(IS& is,CO char& separator,Arg& arg,ARGS&... args){RE VariadicGetline(getline(is,arg,separator),separator,args...);}TE <CL Traits,TY Arg> IN OS& VariadicCout(OS& os,Arg&& arg){RE os << forward<Arg>(arg);}TE <CL Traits,TY Arg1,TY Arg2,TY... ARGS> IN OS& VariadicCout(OS& os,Arg1&& arg1,Arg2&& arg2,ARGS&&... args){RE VariadicCout(os << forward<Arg1>(arg1)<< " ",forward<Arg2>(arg2),forward<ARGS>(args)...);}TE <CL Traits,TY Arg> IN OS& VariadicCoutNonSep(OS& os,Arg&& arg){RE os << forward<Arg>(arg);}TE <CL Traits,TY Arg1,TY Arg2,TY... ARGS> IN OS& VariadicCoutNonSep(OS& os,Arg1&& arg1,Arg2&& arg2,ARGS&&... args){RE VariadicCoutNonSep(os << forward<Arg1>(arg1),forward<Arg2>(arg2),forward<ARGS>(args)...);}TE <CL Traits,TY ARRAY> IN OS& CoutArray(OS& os,CRI i_start,CRI i_ulim,ARRAY&& a){for(int i = i_start;i < i_ulim;i++){(i == i_start?os:(os << " "))<< a[i];}RE os;}

/* Module (6KB)*/
#define DC_OF_CPOINT(POINT)IN CO U& POINT()CO NE
#define DC_OF_POINT(POINT)IN U& POINT()NE
#define DF_OF_CPOINT(POINT)TE <TY U> IN CO U& VirtualPointedSet<U>::POINT()CO NE{RE Point();}
#define DF_OF_POINT(POINT)TE <TY U> IN U& VirtualPointedSet<U>::POINT()NE{RE Point();}
TE <TY U>CL UnderlyingSet{PU:US type = U;};TE <TY U>CL VirtualPointedSet:VI PU UnderlyingSet<U>{PU:VI CO U& Point()CO NE = 0;VI U& Point()NE = 0;DC_OF_CPOINT(Unit);DC_OF_CPOINT(Zero);DC_OF_CPOINT(One);DC_OF_CPOINT(Infty);DC_OF_POINT(init);DC_OF_POINT(root);};TE <TY U>CL PointedSet:VI PU VirtualPointedSet<U>{PU:U m_b_U;IN PointedSet(U b_u = U());IN CO U& Point()CO NE;IN U& Point()NE;};TE <TY U>CL VirtualNSet:VI PU UnderlyingSet<U>{PU:VI U Transfer(CO U& u)= 0;IN U Inverse(CO U& u);};TE <TY U,TY F_U>CL AbstractNSet:VI PU VirtualNSet<U>{PU:F_U m_f_U;IN AbstractNSet(F_U f_U);IN AbstractNSet<U,F_U>& OP=(CO AbstractNSet&)NE;IN U Transfer(CO U& u);};TE <TY U>CL VirtualMagma:VI PU UnderlyingSet<U>{PU:VI U Product(U u0,CO U& u1)= 0;IN U Sum(U u0,CO U& u1);};TE <TY U = ll>CL AdditiveMagma:VI PU VirtualMagma<U>{PU:IN U Product(U u0,CO U& u1);};TE <TY U = ll>CL MultiplicativeMagma:VI PU VirtualMagma<U>{PU:IN U Product(U u0,CO U& u1);};TE <TY U,TY M_U>CL AbstractMagma:VI PU VirtualMagma<U>{PU:M_U m_m_U;IN AbstractMagma(M_U m_U);IN AbstractMagma<U,M_U>& OP=(CO AbstractMagma<U,M_U>&)NE;IN U Product(U u0,CO U& u1);};
TE <TY U> IN PointedSet<U>::PointedSet(U b_U):m_b_U(MO(b_U)){}TE <TY U> IN CO U& PointedSet<U>::Point()CO NE{RE m_b_U;}TE <TY U> IN U& PointedSet<U>::Point()NE{RE m_b_U;}DF_OF_CPOINT(Unit);DF_OF_CPOINT(Zero);DF_OF_CPOINT(One);DF_OF_CPOINT(Infty);DF_OF_POINT(init);DF_OF_POINT(root);TE <TY U,TY F_U> IN AbstractNSet<U,F_U>::AbstractNSet(F_U f_U):m_f_U(MO(f_U)){ST_AS(is_invocable_r_v<U,F_U,U>);}TE <TY U,TY F_U> IN AbstractNSet<U,F_U>& AbstractNSet<U,F_U>::operator=(CO AbstractNSet<U,F_U>&)NE{RE *TH;}TE <TY U,TY F_U> IN U AbstractNSet<U,F_U>::Transfer(CO U& u){RE m_f_U(u);}TE <TY U> IN U VirtualNSet<U>::Inverse(CO U& u){RE Transfer(u);}TE <TY U,TY M_U> IN AbstractMagma<U,M_U>::AbstractMagma(M_U m_U):m_m_U(MO(m_U)){ST_AS(is_invocable_r_v<U,M_U,U,U>);}TE <TY U,TY M_U> IN AbstractMagma<U,M_U>& AbstractMagma<U,M_U>::OP=(CO AbstractMagma<U,M_U>&)NE{RE *TH;}TE <TY U> IN U AdditiveMagma<U>::Product(U u0,CO U& u1){RE MO(u0 += u1);}TE <TY U> IN U MultiplicativeMagma<U>::Product(U u0,CO U& u1){RE MO(u0 *= u1);}TE <TY U,TY M_U> IN U AbstractMagma<U,M_U>::Product(U u0,CO U& u1){RE m_m_U(MO(u0),u1);}TE <TY U> IN U VirtualMagma<U>::Sum(U u0,CO U& u1){RE Product(MO(u0),u1);}

TE <TY U>CL VirtualMonoid:VI PU VirtualMagma<U>,VI PU VirtualPointedSet<U>{};TE <TY U = ll>CL AdditiveMonoid:VI PU VirtualMonoid<U>,PU AdditiveMagma<U>,PU PointedSet<U>{};TE <TY U = ll>CL MultiplicativeMonoid:VI PU VirtualMonoid<U>,PU MultiplicativeMagma<U>,PU PointedSet<U>{PU:IN MultiplicativeMonoid(U e_U);};TE <TY U,TY M_U>CL AbstractMonoid:VI PU VirtualMonoid<U>,PU AbstractMagma<U,M_U>,PU PointedSet<U>{PU:IN AbstractMonoid(M_U m_U,U e_U);};
TE <TY U> IN MultiplicativeMonoid<U>::MultiplicativeMonoid(U e_U):PointedSet<U>(MO(e_U)){}TE <TY U,TY M_U> IN AbstractMonoid<U,M_U>::AbstractMonoid(M_U m_U,U e_U):AbstractMagma<U,M_U>(MO(m_U)),PointedSet<U>(MO(e_U)){}

TE <TY U>CL VirtualGroup:VI PU VirtualMonoid<U>,VI PU VirtualPointedSet<U>,VI PU VirtualNSet<U>{};TE <TY U = ll>CL AdditiveGroup:VI PU VirtualGroup<U>,PU AdditiveMonoid<U>{PU:IN U Transfer(CO U& u);};TE <TY U,TY M_U,TY I_U>CL AbstractGroup:VI PU VirtualGroup<U>,PU AbstractMonoid<U,M_U>,PU AbstractNSet<U,I_U>{PU:IN AbstractGroup(M_U m_U,U e_U,I_U i_U);};
TE <TY U,TY M_U,TY I_U> IN AbstractGroup<U,M_U,I_U>::AbstractGroup(M_U m_U,U e_U,I_U i_U):AbstractMonoid<U,M_U>(MO(m_U),MO(e_U)),AbstractNSet<U,I_U>(MO(i_U)){}TE <TY U> IN U AdditiveGroup<U>::Transfer(CO U& u){RE -u;}

TE <TY R,TY U>CL VirtualRSet:VI PU UnderlyingSet<U>{PU:VI U Action(CO R& r,U u)= 0;IN U PW(U u,CO R& r);IN U ScalarProduct(CO R& r,U u);};TE <TY U,TY MAGMA>CL RegularRSet:VI PU VirtualRSet<U,U>,PU MAGMA{PU:IN RegularRSet(MAGMA magma);IN U Action(CO U& r,U u);};TE <TY MAGMA> RegularRSet(MAGMA magma)-> RegularRSet<inner_t<MAGMA>,MAGMA>;TE <TY R,TY U,TY O_U>CL AbstractRSet:VI PU VirtualRSet<R,U>{PU:O_U m_o_U;IN AbstractRSet(CO R& dummy0,CO U& dummy1,O_U o_U);IN AbstractRSet<R,U,O_U>& OP=(CO AbstractRSet<R,U,O_U>&)NE;IN U Action(CO R& r,U u);};TE <TY R,TY U,TY O_U,TY GROUP>CL AbstractModule:PU AbstractRSet<R,U,O_U>,PU GROUP{PU:IN AbstractModule(CO R& dummy,O_U o_U,GROUP M);};TE <TY R,TY O_U,TY GROUP> AbstractModule(CO R& dummy,O_U o_U,GROUP M)-> AbstractModule<R,inner_t<GROUP>,O_U,GROUP>;TE <TY R,TY U>CL Module:VI PU VirtualRSet<R,U>,PU AdditiveGroup<U>{PU:IN U Action(CO R& r,U u);};
TE <TY R,TY MAGMA> IN RegularRSet<R,MAGMA>::RegularRSet(MAGMA magma):MAGMA(MO(magma)){}TE <TY R,TY U,TY O_U> IN AbstractRSet<R,U,O_U>::AbstractRSet(CO R& dummy0,CO U& dummy1,O_U o_U):m_o_U(MO(o_U)){ST_AS(is_invocable_r_v<U,O_U,R,U>);}TE <TY R,TY U,TY O_U,TY GROUP> IN AbstractModule<R,U,O_U,GROUP>::AbstractModule(CO R& dummy,O_U o_U,GROUP M):AbstractRSet<R,U,O_U>(dummy,M.One(),MO(o_U)),GROUP(MO(M)){ST_AS(is_same_v<U,inner_t<GROUP>>);}TE <TY R,TY U,TY O_U> IN AbstractRSet<R,U,O_U>& AbstractRSet<R,U,O_U>::OP=(CO AbstractRSet<R,U,O_U>&)NE{RE *TH;}TE <TY U,TY MAGMA> IN U RegularRSet<U,MAGMA>::Action(CO U& r,U u){RE TH->Product(r,MO(u));}TE <TY R,TY U,TY O_U> IN U AbstractRSet<R,U,O_U>::Action(CO R& r,U u){RE m_o_U(r,MO(u));}TE <TY R,TY U> IN U Module<R,U>::Action(CO R& r,U u){RE MO(u *= r);}TE <TY R,TY U> IN U VirtualRSet<R,U>::PW(U u,CO R& r){RE Action(r,MO(u));}TE <TY R,TY U> IN U VirtualRSet<R,U>::ScalarProduct(CO R& r,U u){RE Action(r,MO(u));}

/* Graph (5KB)*/
TE <TY T,TY R1,TY R2,TY E>CL VirtualGraph:VI PU UnderlyingSet<T>{PU:VI R1 Enumeration(CRI i)= 0;IN R2 Enumeration_inv(CO T& t);TE <TY PATH> IN R2 Enumeration_inv(CO PATH& p);IN VO Reset();VI CRI SZ()CO NE = 0;VI E& edge()NE = 0;VI ret_t<E,T> Edge(CO T& t)= 0;TE <TY PATH> IN ret_t<E,T> Edge(CO PATH& p);ST IN CO T& Vertex(CO T& t)NE;TE <TY PATH> ST IN CO T& Vertex(CO PATH& e)NE;VI R2 Enumeration_inv_Body(CO T& t)= 0;};TE <TY T,TY R1,TY R2,TY E>CL EdgeImplimentation:VI PU VirtualGraph<T,R1,R2,E>{PU:int m_SZ;E m_edge;IN EdgeImplimentation(CRI SZ,E edge);IN CRI SZ()CO NE;IN E& edge()NE;IN ret_t<E,T> Edge(CO T& t);};TE <TY E>CL Graph:PU EdgeImplimentation<int,CRI,CRI,E>{PU:IN Graph(CRI SZ,E edge);IN CRI Enumeration(CRI i);TE <TY F> IN Graph<F> GetGraph(F edge)CO;IN CRI Enumeration_inv_Body(CRI t);};TE <TY T,TY Enum_T,TY Enum_T_inv,TY E>CL EnumerationGraph:PU EdgeImplimentation<T,ret_t<Enum_T,int>,ret_t<Enum_T_inv,T>,E>{PU:Enum_T m_enum_T;Enum_T_inv m_enum_T_inv;IN EnumerationGraph(CRI SZ,Enum_T enum_T,Enum_T_inv enum_T_inv,E edge);IN ret_t<Enum_T,int> Enumeration(CRI i);TE <TY F> IN EnumerationGraph<T,Enum_T,Enum_T_inv,F> GetGraph(F edge)CO;IN ret_t<Enum_T_inv,T> Enumeration_inv_Body(CO T& t);};TE <TY Enum_T,TY Enum_T_inv,TY E> EnumerationGraph(CRI SZ,Enum_T enum_T,Enum_T_inv enum_T_inv,E edge)-> EnumerationGraph<decldecay_t(declval<Enum_T>()(0)),Enum_T,Enum_T_inv,E>;TE <TY T,TY E>CL MemorisationGraph:PU EdgeImplimentation<T,T,CRI,E>{PU:int m_LE;VE<T> m_memory;Map<T,int> m_memory_inv;IN MemorisationGraph(CRI SZ,CO T& dummy,E edge);IN T Enumeration(CRI i);IN VO Reset();TE <TY F> IN MemorisationGraph<T,F> GetGraph(F edge)CO;IN CRI Enumeration_inv_Body(CO T& t);};
TE <TY T,TY R1,TY R2,TY E> IN EdgeImplimentation<T,R1,R2,E>::EdgeImplimentation(CRI SZ,E edge):m_SZ(SZ),m_edge(MO(edge)){ST_AS(is_COructible_v<T,R1> && is_COructible_v<int,R2> && is_invocable_v<E,T>);}TE <TY E> IN Graph<E>::Graph(CRI SZ,E edge):EdgeImplimentation<int,CRI,CRI,E>(SZ,MO(edge)){}TE <TY T,TY Enum_T,TY Enum_T_inv,TY E> IN EnumerationGraph<T,Enum_T,Enum_T_inv,E>::EnumerationGraph(CRI SZ,Enum_T enum_T,Enum_T_inv enum_T_inv,E edge):EdgeImplimentation<T,ret_t<Enum_T,int>,ret_t<Enum_T_inv,T>,E>(SZ,MO(edge)),m_enum_T(MO(enum_T)),m_enum_T_inv(MO(enum_T_inv)){}TE <TY T,TY E> IN MemorisationGraph<T,E>::MemorisationGraph(CRI SZ,CO T& dummy,E edge):EdgeImplimentation<T,T,CRI,E>(SZ,MO(edge)),m_LE(),m_memory(),m_memory_inv(){ST_AS(is_invocable_v<E,T>);}TE <TY E> IN CRI Graph<E>::Enumeration(CRI i){RE i;}TE <TY T,TY Enum_T,TY Enum_T_inv,TY E> IN ret_t<Enum_T,int> EnumerationGraph<T,Enum_T,Enum_T_inv,E>::Enumeration(CRI i){RE m_enum_T(i);}TE <TY T,TY E> IN T MemorisationGraph<T,E>::Enumeration(CRI i){AS(0 <= i && i < m_LE);RE m_memory[i];}TE <TY T,TY R1,TY R2,TY E> IN R2 VirtualGraph<T,R1,R2,E>::Enumeration_inv(CO T& t){RE Enumeration_inv_Body(t);}TE <TY T,TY R1,TY R2,TY E> TE <TY PATH> IN R2 VirtualGraph<T,R1,R2,E>::Enumeration_inv(CO PATH& p){RE Enumeration_inv_Body(get<0>(p));}TE <TY E> IN CRI Graph<E>::Enumeration_inv_Body(CRI i){RE i;}TE <TY T,TY Enum_T,TY Enum_T_inv,TY E> IN ret_t<Enum_T_inv,T> EnumerationGraph<T,Enum_T,Enum_T_inv,E>::Enumeration_inv_Body(CO T& t){RE m_enum_T_inv(t);}TE <TY T,TY E> IN CRI MemorisationGraph<T,E>::Enumeration_inv_Body(CO T& t){if(m_memory_inv.count(t)== 0){AS(m_LE < TH->SZ());m_memory.push_back(t);RE m_memory_inv[t]= m_LE++;}RE m_memory_inv[t];}TE <TY T,TY R1,TY R2,TY E> VO VirtualGraph<T,R1,R2,E>::Reset(){}TE <TY T,TY E> IN VO MemorisationGraph<T,E>::Reset(){m_LE = 0;m_memory.clear();m_memory_inv.clear();}TE <TY T,TY R1,TY R2,TY E> IN CRI EdgeImplimentation<T,R1,R2,E>::SZ()CO NE{RE m_SZ;}TE <TY T,TY R1,TY R2,TY E> IN E& EdgeImplimentation<T,R1,R2,E>::edge()NE{RE m_edge;}TE <TY T,TY R1,TY R2,TY E> IN ret_t<E,T> EdgeImplimentation<T,R1,R2,E>::Edge(CO T& t){RE m_edge(t);}TE <TY T,TY R1,TY R2,TY E> TE <TY PATH> IN ret_t<E,T> VirtualGraph<T,R1,R2,E>::Edge(CO PATH& p){RE Edge(get<0>(p));}TE <TY E> TE <TY F> IN Graph<F> Graph<E>::GetGraph(F edge)CO{RE Graph<F>(TH->SZ(),MO(edge));}TE <TY T,TY Enum_T,TY Enum_T_inv,TY E> TE <TY F> IN EnumerationGraph<T,Enum_T,Enum_T_inv,F> EnumerationGraph<T,Enum_T,Enum_T_inv,E>::GetGraph(F edge)CO{RE EnumerationGraph<T,Enum_T,Enum_T_inv,F>(TH->SZ(),m_enum_T,m_enum_T_inv,MO(edge));}TE <TY T,TY E> TE <TY F> IN MemorisationGraph<T,F> MemorisationGraph<T,E>::GetGraph(F edge)CO{RE MemorisationGraph<T,F>(TH->SZ(),MO(edge));}TE <TY T,TY R1,TY R2,TY E> IN CO T& VirtualGraph<T,R1,R2,E>::Vertex(CO T& t)NE{RE t;}TE <TY T,TY R1,TY R2,TY E> TE <TY PATH> IN CO T& VirtualGraph<T,R1,R2,E>::Vertex(CO PATH& e)NE{RE Vertex(get<0>(e));}

/* Grid (2KB)*/
#define SET_GRID H_minus = H - 1;W_minus = W - 1;HW = ll(H)* W
#define SET_HW(h,w)H = h;W = w;SET_GRID
#define CIN_HW cin >> H >> W;SET_GRID
TE <TY E>CL GridGraph:PU EnumerationGraph<T2<int>,T2<int>(&)(CRI),int(&)(CO T2<int>&),E>{PU:IN GridGraph(E e);};int H,W,H_minus,W_minus;ll HW;VE<string> grid;char walkable = '.',unwalkable = '#';
IN T2<int> EnumHW(CRI v){RE{v / W,v % W};}IN int EnumHW_inv(CO T2<int>& ij){auto&[i,j]= ij;RE i * W + j;}TE <TY E> IN GridGraph<E>::GridGraph(E e):EnumerationGraph<T2<int>,T2<int>(&)(CRI),int(&)(CO T2<int>&),E>(HW,EnumHW,EnumHW_inv,MO(e)){AS(HW >> 31 == 0 && H * W == HW);}VE<T2<int>> EdgeOnGrid(CO T2<int>& v){VE<T2<int>> AN{};auto&[i,j]= v;if(grid[i][j]== walkable){if(i > 0 && grid[i-1][j]== walkable){AN.push_back({i-1,j});}if(i+1 < H && grid[i+1][j]== walkable){AN.push_back({i+1,j});}if(j > 0 && grid[i][j-1]== walkable){AN.push_back({i,j-1});}if(j+1 < W && grid[i][j+1]== walkable){AN.push_back({i,j+1});}}RE AN;}VE<pair<T2<int>,ll>> WEdgeOnGrid(CO T2<int>& v){VE<pair<T2<int>,ll>> AN{};auto&[i,j]= v;if(grid[i][j]== walkable){if(i>0 && grid[i-1][j]== walkable){AN.push_back({{i-1,j},1});}if(i+1 < H && grid[i+1][j]== walkable){AN.push_back({{i+1,j},1});}if(j>0 && grid[i][j-1]== walkable){AN.push_back({{i,j-1},1});}if(j+1 < W && grid[i][j+1]== walkable){AN.push_back({{i,j+1},1});}}RE AN;}IN VO SetWallStringOnGrid(CRI i,VE<string>& S){if(S.empty()){S.resize(H);}cin >> S[i];AS(int(S[i].SZ())== W);}CO string direction="URDL";IN int DirectionNumberOnGrid(CRI i,CRI j,CRI k,CRI h){RE i < k?2:i > k?0:j < h?1:(AS(j > h),3);}IN int DirectionNumberOnGrid(CO T2<int>& v,CO T2<int>& w){auto&[i,j]= v;auto&[k,h]= w;RE DirectionNumberOnGrid(i,j,k,h);}IN int DirectionNumberOnGrid(CRI v,CRI w){RE DirectionNumberOnGrid(EnumHW(v),EnumHW(w));}IN int ReverseDirectionNumberOnGrid(CRI n){AS(0 <= n && n<4);RE n ^ 2;}

/* ConstexprModulo (7KB)*/
CEXPR(uint,P,998244353);
#define RP Represent
#define DeRP Derepresent

TE <uint M,TY INT> CE INT Residue(INT n)NE{RE MO(n < 0?((((++n)*= -1)%= M)*= -1)+= M - 1:n < INT(M)?n:n %= M);}TE <TY INT> CE INT& ResidueP(INT& n)NE{CE CO uint trunc =(1 << 23)- 1;INT n_u = n >> 23;n &= trunc;INT n_uq =(n_u / 7)/ 17;n_u -= n_uq * 119;n += n_u << 23;RE n < n_uq?n += P - n_uq:n -= n_uq;}
TE <uint M> CL Mod;TE <uint M>CL COantsForMod{PU:COantsForMod()= delete;ST CE CO uint g_memory_bound = 1e6;ST CE CO uint g_memory_LE = M < g_memory_bound?M:g_memory_bound;ST CE uint g_M_minus = M - 1;ST CE int g_order_minus_1 = M - 2;ST CE int g_order_minus_1_neg = -g_order_minus_1;};
#define SFINAE_FOR_MOD enable_if_t<is_COructible_v<uint,decay_t<T>>>*
#define DC_OF_CM_FOR_MOD(OPR)CE bool OP OPR(CO Mod<M>& n)CO NE
#define DC_OF_AR_FOR_MOD(OPR,EX)CE Mod<M> OP OPR(Mod<M> n)CO EX;
#define DF_OF_CM_FOR_MOD(OPR)TE <uint M> CE bool Mod<M>::OP OPR(CO Mod<M>& n)CO NE{RE m_n OPR n.m_n;}
#define DF_OF_AR_FOR_MOD(OPR,EX,LEFT,OPR2)TE <uint M> CE Mod<M> Mod<M>::OP OPR(Mod<M> n)CO EX{RE MO(LEFT OPR2 ## = *TH);}TE <uint M,TY T,SFINAE_FOR_MOD = nullptr> CE Mod<M> OP OPR(T n0,CO Mod<M>& n1)EX{RE MO(Mod<M>(MO(n0))OPR ## = n1);}
TE <uint M>CL Mod{PU:uint m_n;CE Mod()NE;CE Mod(CO Mod<M>& n)NE;CE Mod(Mod<M>&& n)NE;TE <TY T,SFINAE_FOR_MOD = nullptr> CE Mod(T n)NE;CE Mod<M>& OP=(Mod<M> n)NE;CE Mod<M>& OP+=(CO Mod<M>& n)NE;CE Mod<M>& OP-=(CO Mod<M>& n)NE;CE Mod<M>& OP*=(CO Mod<M>& n)NE;IN Mod<M>& OP/=(Mod<M> n);TE <TY INT> CE Mod<M>& OP<<=(INT n);TE <TY INT> CE Mod<M>& OP>>=(INT n);CE Mod<M>& OP++()NE;CE Mod<M> OP++(int)NE;CE Mod<M>& OP--()NE;CE Mod<M> OP--(int)NE;DC_OF_CM_FOR_MOD(==);DC_OF_CM_FOR_MOD(!=);DC_OF_CM_FOR_MOD(<);DC_OF_CM_FOR_MOD(<=);DC_OF_CM_FOR_MOD(>);DC_OF_CM_FOR_MOD(>=);DC_OF_AR_FOR_MOD(+,NE);DC_OF_AR_FOR_MOD(-,NE);DC_OF_AR_FOR_MOD(*,NE);DC_OF_AR_FOR_MOD(/,);TE <TY INT> CE Mod<M> OP^(INT EX)CO;TE <TY INT> CE Mod<M> OP<<(INT n)CO;TE <TY INT> CE Mod<M> OP>>(INT n)CO;CE Mod<M> OP-()CO NE;CE Mod<M>& SignInvert()NE;IN Mod<M>& Invert();TE <TY INT> CE Mod<M>& PW(INT EX);CE VO swap(Mod<M>& n)NE;CE CRUI RP()CO NE;ST CE Mod<M> DeRP(uint n)NE;ST IN CO Mod<M>& Inverse(CRUI n);ST IN CO Mod<M>& Factorial(CRUI n);ST IN CO Mod<M>& FactorialInverse(CRUI n);ST IN Mod<M> Combination(CRUI n,CRUI i);ST IN CO Mod<M>& zero()NE;ST IN CO Mod<M>& one()NE;TE <TY INT> CE Mod<M>& PositivePW(INT EX)NE;TE <TY INT> CE Mod<M>& NonNegativePW(INT EX)NE;US COants = COantsForMod<M>;};
US MP = Mod<P>;
TE <uint M> CE Mod<M>::Mod()NE:m_n(){}TE <uint M> CE Mod<M>::Mod(CO Mod<M>& n)NE:m_n(n.m_n){}TE <uint M> CE Mod<M>::Mod(Mod<M>&& n)NE:m_n(MO(n.m_n)){}TE <uint M> TE <TY T,SFINAE_FOR_MOD> CE Mod<M>::Mod(T n)NE:m_n(Residue<M>(MO(n))){}TE <uint M> CE Mod<M>& Mod<M>::OP=(Mod<M> n)NE{m_n = MO(n.m_n);RE *TH;}TE <uint M> CE Mod<M>& Mod<M>::OP+=(CO Mod<M>& n)NE{(m_n += n.m_n)< M?m_n:m_n -= M;RE *TH;}TE <uint M> CE Mod<M>& Mod<M>::OP-=(CO Mod<M>& n)NE{m_n < n.m_n?(m_n += M)-= n.m_n:m_n -= n.m_n;RE *TH;}TE <uint M> CE Mod<M>& Mod<M>::OP*=(CO Mod<M>& n)NE{m_n = MO(ull(m_n)* n.m_n)% M;RE *TH;}TE <> CE MP& MP::OP*=(CO MP& n)NE{ull m_n_copy = m_n;m_n = MO((m_n_copy *= n.m_n)< P?m_n_copy:ResidueP(m_n_copy));RE *TH;}TE <uint M> IN Mod<M>& Mod<M>::OP/=(Mod<M> n){RE OP*=(n.Invert());}TE <uint M> TE <TY INT> CE Mod<M>& Mod<M>::OP<<=(INT n){AS(n >= 0);RE *TH *= Mod<M>(2).NonNegativePW(MO(n));}TE <uint M> TE <TY INT> CE Mod<M>& Mod<M>::OP>>=(INT n){AS(n >=0);WH(n-- > 0){((m_n & 1)== 0?m_n:m_n += M)>>= 1;}RE *TH;}TE <uint M> CE Mod<M>& Mod<M>::OP++()NE{m_n < COants::g_M_minus?++m_n:m_n = 0;RE *TH;}TE <uint M> CE Mod<M> Mod<M>::OP++(int)NE{Mod<M> n{*TH};OP++();RE n;}TE <uint M> CE Mod<M>& Mod<M>::OP--()NE{m_n == 0?m_n = COants::g_M_minus:--m_n;RE *TH;}TE <uint M> CE Mod<M> Mod<M>::OP--(int)NE{Mod<M> n{*TH};OP--();RE n;}DF_OF_CM_FOR_MOD(==);DF_OF_CM_FOR_MOD(!=);DF_OF_CM_FOR_MOD(>);DF_OF_CM_FOR_MOD(>=);DF_OF_CM_FOR_MOD(<);DF_OF_CM_FOR_MOD(<=);DF_OF_AR_FOR_MOD(+,NE,n,+);DF_OF_AR_FOR_MOD(-,NE,n.SignInvert(),+);DF_OF_AR_FOR_MOD(*,NE,n,*);DF_OF_AR_FOR_MOD(/,,n.Invert(),*);TE <uint M> TE <TY INT> CE Mod<M> Mod<M>::OP^(INT EX)CO{RE MO(Mod<M>(*TH).PW(MO(EX)));}TE <uint M> TE <TY INT> CE Mod<M> Mod<M>::OP<<(INT n)CO{RE MO(Mod<M>(*TH)<<= MO(n));}TE <uint M> TE <TY INT> CE Mod<M> Mod<M>::OP>>(INT n)CO{RE MO(Mod<M>(*TH)>>= MO(n));}TE <uint M> CE Mod<M> Mod<M>::OP-()CO NE{RE MO(Mod<M>(*TH).SignInvert());}TE <uint M> CE Mod<M>& Mod<M>::SignInvert()NE{m_n > 0?m_n = M - m_n:m_n;RE *TH;}TE <uint M> IN Mod<M>& Mod<M>::Invert(){AS(m_n != 0);uint m_n_neg;RE m_n < COants::g_memory_LE?(m_n = Inverse(m_n).m_n,*TH):((m_n_neg = M - m_n)< COants::g_memory_LE)?(m_n = M - Inverse(m_n_neg).m_n,*TH):NonNegativePW(COants::g_order_minus_1);}TE <uint M> TE <TY INT> CE Mod<M>& Mod<M>::PositivePW(INT EX)NE{Mod<M> PW{*TH};EX--;WH(EX != 0){(EX & 1)== 1?*TH *= PW:*TH;EX >>= 1;PW *= PW;}RE *TH;}TE <uint M> TE <TY INT> CE Mod<M>& Mod<M>::NonNegativePW(INT EX)NE{RE EX == 0?(m_n = 1,*TH):PositivePW(MO(EX));}TE <uint M> TE <TY INT> CE Mod<M>& Mod<M>::PW(INT EX){bool neg = EX < 0;AS(!(neg && m_n == 0));RE neg?PositivePW(ll(MO(EX %= COants::g_M_minus))* COants::g_order_minus_1_neg %COants::g_M_minus):NonNegativePW(MO(EX));}TE <uint M> CE VO Mod<M>::swap(Mod<M>& n)NE{std::swap(m_n,n.m_n);}TE <uint M> IN CO Mod<M>& Mod<M>::Inverse(CRUI n){AS(n < M);ST VE<Mod<M>> memory ={zero(),one()};ST uint LE_curr = 2;WH(LE_curr <= n){memory.push_back(DeRP(M - memory[M % LE_curr].m_n * ull(M / LE_curr)% M));LE_curr++;}RE memory[n];}TE <uint M> IN CO Mod<M>& Mod<M>::Factorial(CRUI n){if(M <= n){RE zero();}ST VE<Mod<M>> memory ={one(),one()};ST uint LE_curr = 2;WH(LE_curr <= n){memory.push_back(memory[LE_curr - 1]* LE_curr);LE_curr++;}RE memory[n];}TE <uint M> IN CO Mod<M>& Mod<M>::FactorialInverse(CRUI n){ST VE<Mod<M>> memory ={one(),one()};ST uint LE_curr = 2;WH(LE_curr <= n){memory.push_back(memory[LE_curr - 1]* Inverse(LE_curr));LE_curr++;}RE memory[n];}TE <uint M> IN Mod<M> Mod<M>::Combination(CRUI n,CRUI i){RE i <= n?Factorial(n)* FactorialInverse(i)* FactorialInverse(n - i):zero();}TE <uint M> CE CRUI Mod<M>::RP()CO NE{RE m_n;}TE <uint M> CE Mod<M> Mod<M>::DeRP(uint n)NE{Mod<M> n_copy{};n_copy.m_n = MO(n);RE n_copy;}TE <uint M> IN CO Mod<M>& Mod<M>::zero()NE{ST CE CO Mod<M> z{};RE z;}TE <uint M> IN CO Mod<M>& Mod<M>::one()NE{ST CE CO Mod<M> o{1};RE o;}TE <uint M> IN Mod<M> Inverse(CO Mod<M>& n){RE MO(Mod<M>(n).Invert());}TE <uint M,TY INT> CE Mod<M> PW(Mod<M> n,INT EX){RE MO(n.PW(MO(EX)));}TE <uint M> CE VO swap(Mod<M>& n0,Mod<M>& n1)NE{n0.swap(n1);}TE <uint M> IN string to_string(CO Mod<M>& n)NE{RE to_string(n.RP())+ " + " + to_string(M)+ "Z";}TE <uint M,CL Traits> IN IS& OP>>(IS& is,Mod<M>& n){ll m;is >> m;n = m;RE is;}TE <uint M,CL Traits> IN OS& OP<<(OS& os,CO Mod<M>& n){RE os << n.RP();}
#define DF_OF_HASH_FOR_MOD(MOD)IN size_t hash<MOD>::OP()(CO MOD& n)CO{ST CO hash<decldecay_t(n.RP())> h;RE h(n.RP());}
TE <uint M> DC_OF_HASH(Mod<M>); TE <uint M> DF_OF_HASH_FOR_MOD(Mod<M>);

/* Loop (1KB)*/
TE <TY INT> bool NextLoop(CRI SZ,CO VE<INT>& lower_bound,CO VE<INT>& upper_limit,VE<INT>& index){int depth = 0;WH(depth < SZ){if(++index[depth]< upper_limit[depth]){break;}index[depth]= lower_bound[depth];depth++;}RE depth < SZ;}TE <TY INT> bool NextLoop(CO VE<INT>& lower_bound,CO VE<INT>& upper_limit,VE<INT>& index){RE NextLoop(index.SZ(),lower_bound,upper_limit,index);}TE <TY INT> bool NextLoopEq(CRI SZ,CO VE<INT>& lower_bound,CO VE<INT>& upper_bound,VE<INT>& index){int depth = 0;WH(depth < SZ){if(++index[depth]<= upper_bound[depth]){break;}index[depth]= lower_bound[depth];depth++;}RE depth < SZ;}TE <TY INT> bool NextLoopEq(CO VE<INT>& lower_bound,CO VE<INT>& upper_bound,VE<INT>& index){RE NextLoopEq(index.SZ(),lower_bound,upper_bound,index);}

/* string (1KB)*/
TE <TY INT> IN char IntToChar(CO INT& i,CO char& c = 'a'){RE c + i;}TE <TY INT> IN INT CharToInt(CO char& i){RE i -(i < 'a'?'A':'a');}TE <TY INT>string ArrayToString(CO VE<INT>& A,CO char& c = 'a'){CO int N = A.SZ();string S(N,c);for(int i = 0;i < N;i++){S[i]= IntToChar<INT>(A[i],c);}RE S;}TE <TY INT>VE<INT> StringToArray(CO string& S){CO int N = S.SZ();VE<int> A(N);for(int i = 0;i < N;i++){A[i]= CharToInt<INT>(S[i]);}RE A;}
#endif
/* AAA 常設ライブラリは以上に挿入する。*/

#define INCLUDE_LIBRARY
#include __FILE__

#endif /* INCLUDE_LIBRARY */

#endif /* INCLUDE_SUB */

#endif /* INCLUDE_MAIN */