// 入力制約/フォーマットチェック #ifndef INCLUDE_MODE #define INCLUDE_MODE // #define REACTIVE #define USE_GETLINE #endif #ifdef INCLUDE_MAIN void Solve() { CEXPR( int , bound_N , 2e5 ); GETLINE_COUNT( NK_str , 2 , ' ' ); STOI( NK_str , N , 2 , bound_N ); ll total = ll( N ) * ( N - 1 ) >> 1; STOI( NK_str , K , 1 , total ); CEXPR( int , bound_A , 1e9 ); GETLINE_COUNT( A_str , N , ' ' ); STOI_A( A_str , 0 , N , A , 0 , bound_A ); CEXPR( int , digit , 30 ); vector B( N , bitset() ); FOR( i , 0 , N ){ B[i] = A[i]; } auto order = [&]( const bitset& s0 , const bitset& s1 ){ FOREQINV( d , digit - 1 , 0 ){ if( s0[d] == s1[d] ){ continue; } return s0[d] < s1[d]; } return false; }; sort( B.begin() , B.end() , order ); vector>> p = {{{0,N},{0,N}}}; int a = 0; auto diff = [&]( const T2& lr ){ return ll( lr.second - lr.first ); }; FOREQINV( d , digit - 1 , 0 ){ ll total_sub = 0; vector>> np0{} , np1{}; RUN( p , v ){ vector sep( 2 , vector>( 2 ) ); FOR( num , 0 , 2 ){ auto& [l,r] = v[num]; sep[num] = {{l,r},{r,r}}; FOR( i , l , r ){ if( B[i][d] == 1 ){ sep[num] = {{l,i},{i,r}}; break; } } } total_sub += diff( sep[0][0] ) * diff( sep[1][1] ) + ( v[0] == v[1] ? 0 : diff( sep[1][0] ) * diff( sep[0][1] ) ); FOR( d0 , 0 , 2 ){ if( diff( sep[0][d0] ) > 0 ){ FOR( d1 , 0 , 2 ){ if( diff( sep[1][d1] ) > 0 && ( d0 <= d1 || v[0] != v[1] ) ){ ( d0 == d1 ? np0 : np1 ).push_back( { sep[0][d0] , sep[1][d1] } ); } } } } } p.clear(); if( total < K + total_sub ){ ( a <<= 1 ) |= 1; K -= total - total_sub; total = total_sub; p = move( np1 ); } else { a <<= 1; total -= total_sub; p = move( np0 ); } } RETURN( a ); } REPEAT_MAIN(1); #else // INCLUDE_MAIN #ifdef INCLUDE_LIBRARY // https://github.com/p-adic/cpp // VVV ライブラリは以下に挿入する。redefinitionを避けるため圧縮元はincludeしない。 /* 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 #define OS basic_ostream #define ST_AS static_assert #define reMO_CO remove_const #define is_COructible_v is_constructible_v #define rBE rbegin /* ConstexprModulo (7KB)*/ CEXPR(uint,P,998244353); #define RP Represent #define DeRP Derepresent TE CE INT Residue(INT n)NE{RE MO(n < 0?((((++n)*= -1)%= M)*= -1)+= M - 1:n < INT(M)?n:n %= M);}TE 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 CL Mod;TE 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>>* #define DC_OF_CM_FOR_MOD(OPR)CE bool OP OPR(CO Mod& n)CO NE #define DC_OF_AR_FOR_MOD(OPR,EX)CE Mod OP OPR(Mod n)CO EX; #define DF_OF_CM_FOR_MOD(OPR)TE CE bool Mod::OP OPR(CO Mod& n)CO NE{RE m_n OPR n.m_n;} #define DF_OF_AR_FOR_MOD(OPR,EX,LEFT,OPR2)TE CE Mod Mod::OP OPR(Mod n)CO EX{RE MO(LEFT OPR2 ## = *TH);}TE CE Mod OP OPR(T n0,CO Mod& n1)EX{RE MO(Mod(MO(n0))OPR ## = n1);} TE CL Mod{PU:uint m_n;CE Mod()NE;CE Mod(CO Mod& n)NE;CE Mod(Mod&& n)NE;TE CE Mod(T n)NE;CE Mod& OP=(Mod n)NE;CE Mod& OP+=(CO Mod& n)NE;CE Mod& OP-=(CO Mod& n)NE;CE Mod& OP*=(CO Mod& n)NE;IN Mod& OP/=(Mod n);TE CE Mod& OP<<=(INT n);TE CE Mod& OP>>=(INT n);CE Mod& OP++()NE;CE Mod OP++(int)NE;CE Mod& OP--()NE;CE Mod 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 CE Mod OP^(INT EX)CO;TE CE Mod OP<<(INT n)CO;TE CE Mod OP>>(INT n)CO;CE Mod OP-()CO NE;CE Mod& SignInvert()NE;IN Mod& Invert();TE CE Mod& PW(INT EX);CE VO swap(Mod& n)NE;CE CRUI RP()CO NE;ST CE Mod DeRP(uint n)NE;ST IN CO Mod& Inverse(CRUI n);ST IN CO Mod& Factorial(CRUI n);ST IN CO Mod& FactorialInverse(CRUI n);ST IN Mod Combination(CRUI n,CRUI i);ST IN CO Mod& zero()NE;ST IN CO Mod& one()NE;ST IN CE uint GetModulo()NE;TE CE Mod& PositivePW(INT EX)NE;TE CE Mod& NonNegativePW(INT EX)NE;US COants = COantsForMod;}; US MP = Mod

; TE CE Mod::Mod()NE:m_n(){}TE CE Mod::Mod(CO Mod& n)NE:m_n(n.m_n){}TE CE Mod::Mod(Mod&& n)NE:m_n(MO(n.m_n)){}TE TE CE Mod::Mod(T n)NE:m_n(Residue(MO(n))){}TE CE Mod& Mod::OP=(Mod n)NE{m_n = MO(n.m_n);RE *TH;}TE CE Mod& Mod::OP+=(CO Mod& n)NE{(m_n += n.m_n)< M?m_n:m_n -= M;RE *TH;}TE CE Mod& Mod::OP-=(CO Mod& n)NE{m_n < n.m_n?(m_n += M)-= n.m_n:m_n -= n.m_n;RE *TH;}TE CE Mod& Mod::OP*=(CO Mod& 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 IN Mod& Mod::OP/=(Mod n){RE OP*=(n.Invert());}TE TE CE Mod& Mod::OP<<=(INT n){AS(n >= 0);RE *TH *= Mod(2).NonNegativePW(MO(n));}TE TE CE Mod& Mod::OP>>=(INT n){AS(n >=0);WH(n-- > 0){((m_n & 1)== 0?m_n:m_n += M)>>= 1;}RE *TH;}TE CE Mod& Mod::OP++()NE{m_n < COants::g_M_minus?++m_n:m_n = 0;RE *TH;}TE CE Mod Mod::OP++(int)NE{Mod n{*TH};OP++();RE n;}TE CE Mod& Mod::OP--()NE{m_n == 0?m_n = COants::g_M_minus:--m_n;RE *TH;}TE CE Mod Mod::OP--(int)NE{Mod 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 TE CE Mod Mod::OP^(INT EX)CO{RE MO(Mod(*TH).PW(MO(EX)));}TE TE CE Mod Mod::OP<<(INT n)CO{RE MO(Mod(*TH)<<= MO(n));}TE TE CE Mod Mod::OP>>(INT n)CO{RE MO(Mod(*TH)>>= MO(n));}TE CE Mod Mod::OP-()CO NE{RE MO(Mod(*TH).SignInvert());}TE CE Mod& Mod::SignInvert()NE{m_n > 0?m_n = M - m_n:m_n;RE *TH;}TE IN Mod& Mod::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 TE CE Mod& Mod::PositivePW(INT EX)NE{Mod PW{*TH};EX--;WH(EX != 0){(EX & 1)== 1?*TH *= PW:*TH;EX >>= 1;PW *= PW;}RE *TH;}TE TE CE Mod& Mod::NonNegativePW(INT EX)NE{RE EX == 0?(m_n = 1,*TH):PositivePW(MO(EX));}TE TE CE Mod& Mod::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 CE VO Mod::swap(Mod& n)NE{std::swap(m_n,n.m_n);}TE IN CO Mod& Mod::Inverse(CRUI n){AS(n < M);ST VE> 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 IN CO Mod& Mod::Factorial(CRUI n){if(M <= n){RE zero();}ST VE> 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 IN CO Mod& Mod::FactorialInverse(CRUI n){ST VE> 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 IN Mod Mod::Combination(CRUI n,CRUI i){RE i <= n?Factorial(n)* FactorialInverse(i)* FactorialInverse(n - i):zero();}TE CE CRUI Mod::RP()CO NE{RE m_n;}TE CE Mod Mod::DeRP(uint n)NE{Mod n_copy{};n_copy.m_n = MO(n);RE n_copy;}TE IN CO Mod& Mod::zero()NE{ST CE CO Mod z{};RE z;}TE IN CO Mod& Mod::one()NE{ST CE CO Mod o{1};RE o;}TE IN CE uint Mod::GetModulo()NE{RE M;}TE IN Mod Inverse(CO Mod& n){RE MO(Mod(n).Invert());}TE CE Mod PW(Mod n,INT EX){RE MO(n.PW(MO(EX)));}TE CE VO swap(Mod& n0,Mod& n1)NE{n0.swap(n1);}TE IN string to_string(CO Mod& n)NE{RE to_string(n.RP())+ " + " + to_string(M)+ "Z";}TE IN IS& OP>>(IS& is,Mod& n){ll m;is >> m;n = m;RE is;}TE IN OS& OP<<(OS& os,CO Mod& n){RE os << n.RP();} // AAA ライブラリは以上に挿入する。 #define INCLUDE_MAIN #include __FILE__ #else // INCLUDE_LIBRARY #ifdef DEBUG #define _GLIBCXX_DEBUG #define DEXPR( LL , BOUND , VALUE1 , VALUE2 ) CEXPR( LL , BOUND , VALUE2 ) #define SIGNAL signal( SIGABRT , &AlertAbort ); #define ASSERT( A , MIN , MAX ) CERR( "ASSERTチェック: " , ( MIN ) , ( ( MIN ) <= A ? "<=" : ">" ) , A , ( A <= ( MAX ) ? "<=" : ">" ) , ( MAX ) ); assert( ( MIN ) <= A && A <= ( MAX ) ) #define COUT( ... ) VariadicCout( cout << "出力:" , __VA_ARGS__ ) << endl #define COUTNS( ... ) VariadicCoutNonSep( cout , __VA_ARGS__ ) << flush #define CERR( ... ) VariadicCout( cerr , __VA_ARGS__ ) << endl #define CERRNS( ... ) VariadicCout( cerr , __VA_ARGS__ ) << flush #define COUT_A( A , N ) OUTPUT_ARRAY( cout << "出力:" , A , N ) << endl #define CERR_A( A , N ) OUTPUT_ARRAY( cerr , A , N ) << endl int exec_mode = 0; #else #pragma GCC optimize ( "O3" ) #pragma GCC optimize ( "unroll-loops" ) #pragma GCC target ( "sse4.2,fma,avx2,popcnt,lzcnt,bmi2" ) #define SIGNAL #define DEXPR( LL , BOUND , VALUE1 , VALUE2 ) CEXPR( LL , BOUND , VALUE1 ) #define ASSERT( A , MIN , MAX ) assert( ( MIN ) <= A && A <= ( MAX ) ) #define COUT( ... ) VariadicCout( cout , __VA_ARGS__ ) << ENDL #define COUTNS( ... ) VariadicCoutNonSep( cout , __VA_ARGS__ ) #define CERR( ... ) #define CERRNS( ... ) #define COUT_A( A , N ) OUTPUT_ARRAY( cout , A , N ) << ENDL #define CERR_A( A , N ) #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 #ifdef USE_GETLINE #define SET_LL( A ) { GETLINE( A ## _str ); A = stoll( A ## _str ); } #define GETLINE_SEPARATE( SEPARATOR , ... ) string __VA_ARGS__; VariadicGetline( cin , SEPARATOR , __VA_ARGS__ ) #define GETLINE( ... ) GETLINE_SEPARATE( '\n' , __VA_ARGS__ ) #else #define SET_LL( A ) cin >> A #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 , ... ) vector __VA_ARGS__; SET_A( I , N , __VA_ARGS__ ) #define CIN_AA( LL , I0 , N0 , I1 , N1 , VAR ) vector> VAR( N0 + I0 ); FOR( VARIABLE_FOR_CIN_AA , 0 , N0 ){ SET_A( I1 , N1 , VAR[VARIABLE_FOR_CIN_AA + I0] ); } #endif #include using namespace std; #define REPEAT_MAIN( BOUND ) int main(){ ios_base::sync_with_stdio( false ); cin.tie( nullptr ); SIGNAL; CEXPR( int , bound_test_case_num , BOUND ); int test_case_num = 1; if constexpr( bound_test_case_num > 1 ){ CERR( "テストケースの個数を入力してください。" ); SET_ASSERT( test_case_num , 1 , bound_test_case_num ); } REPEAT( test_case_num ){ if constexpr( bound_test_case_num > 1 ){ CERR( "testcase " , VARIABLE_FOR_REPEAT_test_case_num , ":" ); } Solve(); CERR( "" ); } CHECK_REDUNDANT_INPUT; } #define START_WATCH chrono::system_clock::time_point watch = chrono::system_clock::now() #define CURRENT_TIME static_cast( chrono::duration_cast( chrono::system_clock::now() - watch ).count() / 1000.0 ) #define CHECK_WATCH( TL_MS ) ( CURRENT_TIME < TL_MS - 100.0 ) #define CEXPR( LL , BOUND , VALUE ) constexpr LL BOUND = VALUE #define SET_ASSERT( A , MIN , MAX ) SET_LL( A ); ASSERT( A , MIN , MAX ) #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 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( N1 + I1 ) ); SET_AA_ASSERT( I0 , N0 , I1 , N1 , A , MIN , MAX ) #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 ) #define RETURN( ... ) COUT( __VA_ARGS__ ); return // 型のエイリアス #define decldecay_t( VAR ) decay_t template using ret_t = decltype( declval()( declval()... ) ); template using inner_t = typename T::type; using uint = unsigned int; using ll = long long; using ull = unsigned long long; using ld = long double; using lld = __float128; template using T2 = pair; template using T3 = tuple; template using T4 = tuple; using path = pair; /* VVV 常設ライブラリの非圧縮版は以下に挿入する。*/ // Random ll GetRand( const int& Rand_min , const int& Rand_max ) { assert( Rand_min <= Rand_max ); ll answer = time( NULL ); return answer * rand() % ( Rand_max + 1 - Rand_min ) + Rand_min; } // Set #define DECLARATION_OF_HASH( ... ) \ struct hash<__VA_ARGS__> \ { \ \ inline size_t operator()( const __VA_ARGS__& n ) const; \ \ }; \ class is_ordered { private: is_ordered() = delete; template static constexpr auto Check( const T& t ) -> decltype( t < t , true_type() ); static constexpr false_type Check( ... ); public: template static constexpr const bool value = is_same_v< decltype( Check( declval() ) ) , true_type >; }; template using Set = conditional_t>,unordered_set,conditional_t,set,void>>; // Tuple #define DECLARATION_OF_ARITHMETIC_FOR_TUPLE( OPR ) \ template typename V> inline auto operator OPR ## =( V& t0 , const V& t1 ) -> decltype( ( get<0>( t0 ) , t0 ) )&; \ template inline tuple& operator OPR ## =( tuple& t0 , const tuple& t1 ); \ template inline tuple& operator OPR ## =( tuple& t0 , const tuple& t1 ); \ template typename V> inline auto operator OPR ## =( V& t0 , const ARG& t1 ) -> decltype( ( get<0>( t0 ) , t0 ) )&; \ template inline tuple& operator OPR ## =( tuple& t0 , const ARG& t1 ); \ template inline tuple& operator OPR ## =( tuple& t0 , const ARG& t1 ); \ template