#if defined(MYLOCAL) # include "mylocal.h" using namespace atcoder; #else # pragma GCC optimize("Ofast") # include "bits/stdc++.h" # if __has_include() # include using namespace atcoder; # endif #endif using namespace std; using ll=long long; using dd=double; using vll=vector< ll>; using vdd=vector< dd>; using vvll=vector< vll>; using vvdd=vector; using vvvll=vector< vvll>; using vvvdd=vector; using vvvvll=vector; using pll=pair; using tll=tuple; using qll=tuple; using vpll=vector< pll>; using vtll=vector< tll>; using vqll=vector< qll>; using vvpll=vector; using vvtll=vector; using vvqll=vector; using namespace chrono; struct{ system_clock::time_point st = system_clock::now(); ll operator()()const{return duration_cast(system_clock::now()-st).count()/1000;} } timeget; constexpr ll INF = 1001001001001001001; struct Fast{ Fast(){ cin.tie(0); ios::sync_with_stdio(false); cout<::max_digits10); } } fast; #define REPS(i, S, E) for (ll i = (S); i <= (E); i++) #define REP(i, N) REPS(i, 0, (N)-1) #define DEPS(i, S, E) for (ll i = (E); i >= (S); i--) #define DEP(i, N) DEPS(i, 0, (N)-1) #define EXPAND( x ) x//VS用おまじない #define overload3(_1,_2,_3,name,...) name #define overload4(_1,_2,_3,_4,name,...) name #define overload5(_1,_2,_3,_4,_5,name,...) name #define rep3(i, S, E) for (ll i = (S); i <= (E); i++) #define rep4(i, S, E, t) for (ll i = (S); i <= (E); i+=(t)) #define rep(...) EXPAND(overload4(__VA_ARGS__,rep4,rep3,_,_)(__VA_ARGS__)) #define dep3(i, E, S) for (ll i = (E); i >= (S); i--) #define dep4(i, E, S, t) for (ll i = (E); i >= (S); i-=(t)) #define dep(...) EXPAND(overload4(__VA_ARGS__, dep4, dep3,_,_)(__VA_ARGS__)) #define each2(e,v) for (auto && e:v) #define each3(a,b,v) for (auto &&[a,b]:v) #define each4(a,b,c,v) for (auto &&[a,b,c]:v) #define each5(a,b,c,d,v) for (auto &&[a,b,c,d]:v) #define each(...) EXPAND(overload5(__VA_ARGS__,each5,each4,each3,each2,_)(__VA_ARGS__)) #define ALL1(v) (v).begin(), (v).end() #define ALL2(v,E) (v).begin(), (v).begin()+((E)+1) #define ALL3(v,S,E) (v).begin()+(S), (v).begin()+((E)+1) #define ALL(...) EXPAND(overload3(__VA_ARGS__, ALL3, ALL2, ALL1)(__VA_ARGS__)) #define all ALL #define RALL1(v) (v).rbegin(), (v).rend() #define RALL2(v,E) (v).rbegin(), (v).rbegin()+((E)+1) #define RALL3(v,S,E) (v).rbegin()+(S), (v).rbegin()+((E)+1) #define RALL(...) EXPAND(overload3(__VA_ARGS__, RALL3, RALL2, RALL1)(__VA_ARGS__)) #define rall RALL template inline bool chmax(T &a, T b) { if (a < b) { a = b; return true; }return false; } template inline bool chmin(T &a, T b) { if (a > b) { a = b; return true; }return false; } template inline T MaxE(vector&v,ll S,ll E){ T m=v[S]; rep(i,S,E)chmax(m,v[i]); return m; } template inline T MinE(vector&v,ll S,ll E){ T m=v[S]; rep(i,S,E)chmin(m,v[i]); return m; } template inline T MaxE(vector &v) { return MaxE(v,0,(ll)v.size()-1); } template inline T MinE(vector &v) { return MinE(v,0,(ll)v.size()-1); } template inline auto maxe(T &&v,ll S,ll E){ return *max_element(ALL(v,S,E)); } template inline auto maxe(T &&v){ return *max_element(ALL(v)); } template inline auto mine(T &&v,ll S,ll E){ return *min_element(ALL(v,S,E)); } template inline auto mine(T &&v){ return *min_element(ALL(v)); } template inline T Sum(vector &v,ll S,ll E){ T s=T(); rep(i,S,E)s+=v[i]; return s; } template inline T Sum(vector &v) { return Sum(v,0,v.size()-1); } template::type::value_type> inline U sum(T &&v,ll S,ll E) {return accumulate(all(v,S,E),U());} template inline auto sum(T &&v) {return sum(v,0,v.end()-v.begin()-1);} template inline ll sz(T &&v){ return (ll)v.size(); } inline ll CEIL(ll a,ll b){ return (a<0) ? -(-a/b) : (a+b-1)/b; } //負もOK inline ll FLOOR(ll a,ll b){ return -CEIL(-a,b); } //負もOK //pair用テンプレート template inline pair& operator+=(pair &a,const pair &b){ a.first+=b.first; a.second+=b.second; return a; } template inline pair& operator-=(pair &a,const pair &b){ a.first-=b.first; a.second-=b.second; return a; } template inline pair& operator*=(pair &a,const pair &b){ a.first*=b.first; a.second*=b.second; return a; } template inline pair& operator/=(pair &a,const pair &b){ a.first/=b.first; a.second/=b.second; return a; } template inline pair& operator%=(pair &a,const pair &b){ a.first%=b.first; a.second%=b.second; return a; } template inline pair& operator+=(pair &a,R b){ a.first+=b; a.second+=b; return a; } template inline pair& operator-=(pair &a,R b){ a.first-=b; a.second-=b; return a; } template inline pair& operator*=(pair &a,R b){ a.first*=b; a.second*=b; return a; } template inline pair& operator/=(pair &a,R b){ a.first/=b; a.second/=b; return a; } template inline pair& operator%=(pair &a,R b){ a.first%=b; a.second%=b; return a; } template inline pair operator+(const pair &a,R b){ pair c=a; return c+=b; } template inline pair operator-(const pair &a,R b){ pair c=a; return c-=b; } template inline pair operator*(const pair &a,R b){ pair c=a; return c*=b; } template inline pair operator/(const pair &a,R b){ pair c=a; return c/=b; } template inline pair operator%(const pair &a,R b){ pair c=a; return c%=b; } template inline pair operator-(R b,const pair &a){ pair c=-a; return c+=b; } template inline pair operator-(const pair &a,const pair &b){ pair c=a; return c-=b; } template inline pair operator-(const pair &a){ pair c=a; return c*=(-1); } template inline ostream &operator<<(ostream &os,const pair &a){ return os << a.first << ' ' << a.second; } //tuple用テンプレート 出力用のみ template inline ostream &operator<<(ostream &os,const tuple &a){ return os << get<0>(a) << ' ' << get<1>(a) << ' ' << get<2>(a); } template inline ostream &operator<<(ostream &os,const tuple &a){ return os << get<0>(a) << ' ' << get<1>(a) << ' ' << get<2>(a) << ' ' << get<3>(a); } //vector用テンプレート template inline vector& operator+=(vector &a,const vector &b){ for (ll i=0; i<(ll)a.size(); i++) a[i]+=b[i]; return a; } template inline vector& operator-=(vector &a,const vector &b){ for (ll i=0; i<(ll)a.size(); i++) a[i]-=b[i]; return a; } template inline vector& operator*=(vector &a,const vector &b){ for (ll i=0; i<(ll)a.size(); i++) a[i]*=b[i]; return a; } template inline vector& operator/=(vector &a,const vector &b){ for (ll i=0; i<(ll)a.size(); i++) a[i]/=b[i]; return a; } template inline vector& operator%=(vector &a,const vector &b){ for (ll i=0; i<(ll)a.size(); i++) a[i]%=b[i]; return a; } template inline vector& operator+=(vector &a,S b){ for (T &e: a) e+=b; return a; } template inline vector& operator-=(vector &a,S b){ for (T &e: a) e-=b; return a; } template inline vector& operator*=(vector &a,S b){ for (T &e: a) e*=b; return a; } template inline vector& operator/=(vector &a,S b){ for (T &e: a) e/=b; return a; } template inline vector& operator%=(vector &a,S b){ for (T &e: a) e%=b; return a; } template inline vector operator+(const vector &a,S b){ vector c=a; return c+=b; } template inline vector operator-(const vector &a,S b){ vector c=a; return c-=b; } template inline vector operator*(const vector &a,S b){ vector c=a; return c*=b; } template inline vector operator/(const vector &a,S b){ vector c=a; return c/=b; } template inline vector operator%(const vector &a,S b){ vector c=a; return c%=b; } template inline vector operator-(S b,const vector &a){ vector c=-a; return c+=b; } template inline vector operator-(const vector &a,const vector &b){ vector c=a; return c-=b; } template inline vector operator-(const vector &a){ vector c=a; return c*=(-1); } template inline ostream &operator<<(ostream &os,const vector &a){ for (ll i=0; i<(ll)a.size(); i++) os<<(i>0?" ":"")< inline array& operator+=(array &a,const array &b){ for (ll i=0; i<(ll)S; i++) a[i]+=b[i]; return a; } template inline array& operator-=(array &a,const array &b){ for (ll i=0; i<(ll)S; i++) a[i]-=b[i]; return a; } template inline array& operator*=(array &a,const array &b){ for (ll i=0; i<(ll)S; i++) a[i]*=b[i]; return a; } template inline array& operator/=(array &a,const array &b){ for (ll i=0; i<(ll)S; i++) a[i]/=b[i]; return a; } template inline array& operator%=(array &a,const array &b){ for (ll i=0; i<(ll)S; i++) a[i]%=b[i]; return a; } template inline array& operator+=(array &a,R b){ for (T &e: a) e+=b; return a; } template inline array& operator-=(array &a,R b){ for (T &e: a) e-=b; return a; } template inline array& operator*=(array &a,R b){ for (T &e: a) e*=b; return a; } template inline array& operator/=(array &a,R b){ for (T &e: a) e/=b; return a; } template inline array& operator%=(array &a,R b){ for (T &e: a) e%=b; return a; } template inline array operator+(const array &a,R b){ array c=a; return c+=b; } template inline array operator-(const array &a,R b){ array c=a; return c-=b; } template inline array operator*(const array &a,R b){ array c=a; return c*=b; } template inline array operator/(const array &a,R b){ array c=a; return c/=b; } template inline array operator%(const array &a,R b){ array c=a; return c%=b; } template inline array operator-(R b,const array &a){ array c=-a; return c+=b; } template inline array operator-(const array &a,const array &b){ array c=a; return c-=b; } template inline array operator-(const array &a){ array c=a; return c*=(-1); } template inline ostream &operator<<(ostream &os,const array &a){ for (ll i=0; i<(ll)S; i++) os<<(i>0?" ":"")< struct mll_{ ll val; mll_(ll v = 0): val(v % MOD){ if (val < 0) val += MOD; } bool isnone() const { return val==-1; } //true:値なし mll_ &none() { val=-1; return *this; } //値なしにする mll_ operator - () const { return -val; } mll_ operator + (const mll_ &b) const { return val + b.val; } mll_ operator - (const mll_ &b) const { return val - b.val; } mll_ operator * (const mll_ &b) const { return val * b.val; } mll_ operator / (const mll_ &b) const { return mll_(*this) /= b; } mll_ operator + (ll b) const { return *this + mll_(b); } mll_ operator - (ll b) const { return *this - mll_(b); } mll_ operator * (ll b) const { return *this * mll_(b); } friend mll_ operator + (ll a,const mll_ &b) { return b + a; } friend mll_ operator - (ll a,const mll_ &b) { return -b + a; } friend mll_ operator * (ll a,const mll_ &b) { return b * a; } friend mll_ operator / (ll a,const mll_ &b) { return mll_(a)/b; } mll_ &operator += (const mll_ &b) { val=(val+b.val)%MOD; return *this; } mll_ &operator -= (const mll_ &b) { val=(val+MOD-b.val)%MOD; return *this; } mll_ &operator *= (const mll_ &b) { val=(val*b.val)%MOD; return *this; } mll_ &operator /= (const mll_ &b) { ll c=b.val,d=MOD,u=1,v=0; while (d){ ll t = c / d; c -= t * d; swap(c,d); u -= t * v; swap(u,v); } val = val * u % MOD; if (val < 0) val += MOD; return *this; } mll_ &operator += (ll b) { return *this += mll_(b); } mll_ &operator -= (ll b) { return *this -= mll_(b); } mll_ &operator *= (ll b) { return *this *= mll_(b); } mll_ &operator /= (ll b) { return *this /= mll_(b); } bool operator == (const mll_ &b) const { return val == b.val; } bool operator != (const mll_ &b) const { return val != b.val; } bool operator == (ll b) const { return *this == mll_(b); } bool operator != (ll b) const { return *this != mll_(b); } friend bool operator == (ll a,const mll_ &b) { return mll_(a) == b.val; } friend bool operator != (ll a,const mll_ &b) { return mll_(a) != b.val; } friend ostream &operator << (ostream &os,const mll_ &a) { return os << a.val; } friend istream &operator >> (istream &is,mll_ &a) { return is >> a.val; } static mll_ Combination(ll a,ll b){ chmin(b,a-b); if (b<0) return mll_(0); mll_ c = 1, d = 1; rep(i,0,b-1) c *= a-i; rep(i,0,b-1) d *= i+1; return c/d; } enum{modll=MOD}; }; template struct view1d; template struct view1dIter{ view1d *vw=nullptr; ll idx=INF; view1dIter(){} view1dIter(view1d *vw_,ll idx_):vw(vw_),idx(idx_){} view1dIter(const view1dIter &it):vw(it.vw),idx(it.idx){} R &operator*() { return (*vw)[idx]; } R &operator*() const{ return (*vw)[idx]; } R &operator[](ll i) { return (*vw)[idx+i]; } R &operator[](ll i)const{ return (*vw)[idx+i]; } auto &operator++(){ idx++; return *this; } auto &operator--(){ idx--; return *this; } auto operator++(int){ auto it=*this; idx++; return it; } auto operator--(int){ auto it=*this; idx--; return it; } auto &operator+=(ll n){ idx+=n; return *this; } auto &operator-=(ll n){ idx-=n; return *this; } auto operator+(ll n){ auto it=*this; return it+=n; } auto operator-(ll n){ auto it=*this; return it-=n; } ll operator- (const view1dIter &it)const{ return idx- it.idx; } bool operator< (const view1dIter &it)const{ return idx< it.idx; } bool operator> (const view1dIter &it)const{ return idx> it.idx; } bool operator<=(const view1dIter &it)const{ return idx<=it.idx; } bool operator>=(const view1dIter &it)const{ return idx>=it.idx; } bool operator!=(const view1dIter &it)const{ return idx!=it.idx; } bool operator==(const view1dIter &it)const{ return idx==it.idx; } using iterator_category = random_access_iterator_tag; using value_type = R; using difference_type = ll; using pointer = R*; using reference = R&; }; template struct view1d{ using Sll=array; T &data; //参照先データ Sll dsize; //参照先データ各軸のサイズ Sll s=Sll(); //view先頭 Sll d=Sll(); //view方向 ll len; //view長さ R &dummy; //範囲外の値参照 R dummyj=R(); //範囲外の値実体 /*---- コンストラクタ ----*/ view1d(T &v): data(v),dummy(dummyj){ SetDsize(v,dsize); d[S-1]=1; len=dsize[S-1]; } //このコンストラクタは、マイナス座標指定を末尾にしない(暫定) //代入時Array{...}等と書くため、使い勝手悪い。将来廃止するかも。 view1d(T &v,Sll s,Sll e,Sll d): data(v),s(s),d(d),len(Len(s,e,d)),dummy(dummyj){ SetDsize(v,dsize); } view1d(T &v,Sll s,Sll d,ll len,R &dmy_): data(v),s(s),d(d),len(len),dummy(dmy_){ SetDsize(v,dsize); } /*---- 演算 ----*/ template auto &operator =(const Q &b){ rep(i,0,len-1) (*this)[i] =b; return *this; } template auto &operator+=(const Q &b){ rep(i,0,len-1) (*this)[i]+=b; return *this; } template auto &operator-=(const Q &b){ rep(i,0,len-1) (*this)[i]-=b; return *this; } template auto &operator*=(const Q &b){ rep(i,0,len-1) (*this)[i]*=b; return *this; } template auto &operator/=(const Q &b){ rep(i,0,len-1) (*this)[i]/=b; return *this; } template auto &operator%=(const Q &b){ rep(i,0,len-1) (*this)[i]%=b; return *this; } auto &operator =(const string &b){ return CpSeq(b); } template auto &operator =(const char (&b)[Q]){ return *this=string(b); } template auto &operator =(const vector &b){ return CpSeq(b); } template auto &operator+=(const vector &b){ return PlSeq(b); } template auto &operator-=(const vector &b){ return MnSeq(b); } template auto &operator*=(const vector &b){ return PrSeq(b); } template auto &operator/=(const vector &b){ return DvSeq(b); } template auto &operator%=(const vector &b){ return RmSeq(b); } template auto &operator =(const view1d &b){ return CpSeq(b); } template auto &operator+=(const view1d &b){ return PlSeq(b); } template auto &operator-=(const view1d &b){ return MnSeq(b); } template auto &operator*=(const view1d &b){ return PrSeq(b); } template auto &operator/=(const view1d &b){ return DvSeq(b); } template auto &operator%=(const view1d &b){ return RmSeq(b); } template auto &CpSeq(const Q &b){ rep(i,0,min(sz(b),len)-1) (*this)[i] =b[i]; return *this; } template auto &PlSeq(const Q &b){ rep(i,0,min(sz(b),len)-1) (*this)[i]+=b[i]; return *this; } template auto &MnSeq(const Q &b){ rep(i,0,min(sz(b),len)-1) (*this)[i]-=b[i]; return *this; } template auto &PrSeq(const Q &b){ rep(i,0,min(sz(b),len)-1) (*this)[i]*=b[i]; return *this; } template auto &DvSeq(const Q &b){ rep(i,0,min(sz(b),len)-1) (*this)[i]/=b[i]; return *this; } template auto &RmSeq(const Q &b){ rep(i,0,min(sz(b),len)-1) (*this)[i]%=b[i]; return *this; } //template static bool eq(const Q &a,const P &b){ // return equals(ALL(a),ALL(b)); //} template static bool eq(const Q &a,const P &b){ if ((ll)a.size()!=(ll)b.size()) return false; rep(i,0,(ll)a.size()-1){ if (a[i]!=b[i]) return false; } return true; } template static bool lt(const Q &a,const P &b){ ll n=min((ll)a.size(),(ll)b.size()); rep(i,0,n-1){ if (a[i]b[i])return false; } return (ll)a.size()<(ll)b.size(); } template bool operator==( const view1d &b){ return eq(*this,b); } template bool operator==( const Q &b){ return eq(*this,b); } template friend bool operator==(const Q &a,const view1d &b){ return eq( a,b); } template bool operator==( const char (&b)[Q]){ return eq(*this,string(b)); } template bool operator!=( const view1d &b){ return !(*this==b); } template bool operator!=( const Q &b){ return !(*this==b); } template friend bool operator!=(const Q &a,const view1d &b){ return !( a==b); } template bool operator< ( const view1d &b){ return lt(*this,b); } template bool operator< ( const Q &b){ return lt(*this,b); } template friend bool operator< (const Q &a,const view1d &b){ return lt( a,b); } template bool operator> ( const view1d &b){ return lt(b,*this); } template bool operator> ( const Q &b){ return lt(b,*this); } template friend bool operator> (const Q &a,const view1d &b){ return lt(b,a ); } template bool operator<=( const view1d &b){ return !(*this>b); } template bool operator<=( const Q &b){ return !(*this>b); } template friend bool operator<=(const Q &a,const view1d &b){ return !( a>b); } template bool operator>=( const view1d &b){ return !(*this bool operator>=( const Q &b){ return !(*this friend bool operator>=(const Q &a,const view1d &b){ return !( a(OrgAt(s+d*i)); } const R &operator[](ll i) const { return OrgAt(s+d*i); } R &at(ll i){ if(i<0)i+=len; return (*this)[i]; } //vector tov(){ vector vvv(len); rep(i,0,len-1) vvv[i]=(*this)[i]; return vvv; } operator vector(){ vector v(len); rep(i,0,len-1) v[i]=(*this)[i]; return v; } bool contains(R a){ rep(i,0,len-1) if((*this)[i]==a)return true; return false; } auto begin(){ return view1dIter(this,0); } auto end(){ return view1dIter(this,len); } /*---- view設定 ----*/ view1d &dmy(R dmy_) { dummy=dmy_; return *this; }//ダミー値セット template view1d &st(Q... s_){//始点set 負は末尾からの位置 this->s=RevIfNeg(SllD(s_...)); this->len=AutoLen(this->s,this->d,this->dsize); return *this; } template view1d &en(Q... e_){//終了条件再設定 負は末尾から this->len=Len(s, RevIfNeg(SllD(e_...)), d); return *this; } template view1d &dir(Q... d_){//方向set、長さはdata端まで this->d=SllD(d_...); this->len=AutoLen(this->s,this->d,this->dsize); return *this; } template view1d &mv(Q... s_){ this->s+=SllD(s_...); return *this; }//平行移動 view1d &size(ll len_) { len=len_; return *this; }//長さset template view1d &size(Q &v){ len=(ll)v.size(); return *this; }//長さset view1d &rev() { s+=d*(len-1); d*=-1; return *this; }//反転 /*---- utility ----*/ template inline static ll sz(Q &v){ return (ll)v.size(); } Sll RevIfNeg(Sll pos){//!< 負なら末尾からの位置に変換 rep(i,0,S-1) if (pos[i]<0) pos[i]+=dsize[i]; return pos; } static ll AutoLen(Sll s_,Sll d_,Sll dsz){//位置s_から方向d_ではみ出すまでの長さ Sll e=dsz-1; rep(i,0,S-1) e[i] *= (d_[i]>=0);//方向が負の軸を0にする return Len(s_,e,d_); } /*---- 先頭位置s、方向d、終了条件eから長さlen計算 ----*/ //template static ll Len(array s,array e,array d){ // ll ret=INF; // rep(i,0,Q-1) chmin(ret, Len1(s[i],e[i],d[i])); // return ret; //} static ll Len(Sll s,Sll e,Sll d){ ll ret=INF; rep(i,0,S-1) chmin(ret, Len1(s[i],e[i],d[i])); return ret; } static ll Len1(ll s,ll e,ll d){ if (d==0) return INF; if (d<0){ s=-s; e=-e; d=-d; } if (s>e) return 0; return (e-s)/d+1; } /*---- 可変長引数をSllに変換 ----*/ template static Sll SllD(Q... args){ return SllRec(0,args...); } template static Sll SllRec(ll i,ll first,Q... rest) { Sll sll = (i==S-1) ? Sll() : SllRec(i+1,rest...); sll[i]=first; return sll; } static Sll SllRec(ll i){ return Sll(); } /*---- dataの位置posの値取得 ----*/ const R &OrgAt(Sll pos) const { rep(i,0,S-1){ if (pos[i]<0 || dsize[i]<=pos[i]) return dummy; } return OrgAt_(data,pos); } template using V = vector; template using VV = V>; template using VVV = V>>; using Vs = V; using VVs = VV; using ll1 = array; using ll2 = array; using ll3 = array; auto &OrgAt_(V &dat,ll1 pos)const{ auto [i] =pos; return dat[i]; } auto &OrgAt_(string &dat,ll1 pos)const{ auto [i] =pos; return dat[i]; } auto &OrgAt_(VV &dat,ll2 pos)const{ auto [i,j] =pos; return dat[i][j]; } auto &OrgAt_(Vs &dat,ll2 pos)const{ auto [i,j] =pos; return dat[i][j]; } auto &OrgAt_(VVV &dat,ll3 pos)const{ auto [i,j,k]=pos; return dat[i][j][k]; } auto &OrgAt_(VVs &dat,ll3 pos)const{ auto [i,j,k]=pos; return dat[i][j][k]; } /*---- dataの各軸size取得 ----*/ static void SetDsize(V &dat,ll1 &dsz){ dsz={sz(dat)}; } static void SetDsize(string &dat,ll1 &dsz){ dsz={sz(dat)}; } static void SetDsize(VV &dat,ll2 &dsz){ dsz={sz(dat),sz(dat[0])}; } static void SetDsize(Vs &dat,ll2 &dsz){ dsz={sz(dat),sz(dat[0])}; } static void SetDsize(VVV &dat,ll3 &dsz){ dsz={sz(dat),sz(dat[0]),sz(dat[0][0])}; } static void SetDsize(VVs &dat,ll3 &dsz){ dsz={sz(dat),sz(dat[0]),sz(dat[0][0])}; } typedef view1dIter iterator; using value_type = R; }; template using V = vector; template using VV = V>; template using VVV = V>>; template view1d( VVV ) -> view1d< VVV,3,T>; template view1d( VV ) -> view1d< VV,2,T>; template view1d( V ) -> view1d< V,1,T>; ; view1d(VV ) -> view1d,3,char>; ; view1d( V ) -> view1d< V,2,char>; ; view1d( string ) -> view1d< string ,1,char>; template view1d( VVV,S,S,S) -> view1d< VVV,3,T>; template view1d( VV,S,S,S) -> view1d< VV,2,T>; template view1d( V,S,S,S) -> view1d< V,1,T>; template view1d(VV,S,S,S) -> view1d,3,char>; template view1d( V,S,S,S) -> view1d< V,2,char>; template view1d( string ,S,S,S) -> view1d< string ,1,char>; template struct view2dIter{ VIEW2D *vw=nullptr; ll idx=INF; view2dIter(){} view2dIter(VIEW2D *vw_,ll idx_):vw(vw_),idx(idx_){} view2dIter(const view2dIter &it):vw(it.vw),idx(it.idx){} auto &operator*() { return (*vw)[x(idx)][y(idx)]; } auto &operator*() const{ return (*vw)[x(idx)][y(idx)]; } auto &operator[](ll i) { return (*vw)[x(idx+i)][y(idx+i)]; } auto &operator[](ll i)const{ return (*vw)[x(idx+i)][y(idx+i)]; } auto &operator++(){ idx++; return *this; } auto &operator--(){ idx--; return *this; } auto operator++(int){ auto it=*this; idx++; return it; } auto operator--(int){ auto it=*this; idx--; return it; } auto &operator+=(ll n){ idx+=n; return *this; } auto &operator-=(ll n){ idx-=n; return *this; } auto operator+(ll n){ auto it=*this; return it+=n; } auto operator-(ll n){ auto it=*this; return it-=n; } ll operator- (const view2dIter &it)const{ return idx- it.idx; } bool operator< (const view2dIter &it)const{ return idx< it.idx; } bool operator> (const view2dIter &it)const{ return idx> it.idx; } bool operator<=(const view2dIter &it)const{ return idx<=it.idx; } bool operator>=(const view2dIter &it)const{ return idx>=it.idx; } bool operator!=(const view2dIter &it)const{ return idx!=it.idx; } bool operator==(const view2dIter &it)const{ return idx==it.idx; } ll x(ll i)const{ return i/vw->leny(); } ll y(ll i)const{ return i%vw->leny(); } using iterator_category = random_access_iterator_tag; using value_type = typename VIEW2D::value_type; using difference_type = ll; using pointer = value_type*; using reference = value_type&; }; template struct view2d{ using Sll=array; T &data; //参照先データ Sll dsize; //参照先データ各軸のサイズ Sll s=Sll(); //view始点 Sll dx=Sll(); //view x軸方向 Sll dy=Sll(); //view y軸方向 ll xl; //view x軸長さ ll yl; //view y軸長さ R dummy=R(); //範囲外の値 /*---- コンストラクタ ----*/ view2d(T &v): data(v){ view1d::SetDsize(v,dsize); dx[S-2]=1; dy[S-1]=1; xl=dsize[S-2]; yl=dsize[S-1]; } /*---- 演算 ----*/ //template auto &operator =(const Q &b){ rep(i,0,xl-1) (*this)[i] =b; return *this; } //template auto &operator+=(const view2d &b){ // rep(i,0,xl-1) (*this)[i] // return PlSeq(b); } /*---- getter ----*/ ll size() const { return xl; } array shape() const { return {xl,yl}; } ll lenx() const { return xl; } ll leny() const { return yl; } ///pll shape() const { return {xl,yl}; } view1d operator[](ll i){ return view1d(data,s+dx*i,dy,yl,dummy); } const view1d operator[](ll i) const { return view1d(data,s+dx*i,dy,yl,dummy); } R &at(ll i,ll j){ if(i<0)i+=xl; if(j<0)j+=yl; return (*this)[i][j]; } //vector> tovv(){ // vector> vvv(xl); // ///rep(i,0,xl-1) vvv[i]=(*this)[i].tov(); return vvv; // rep(i,0,xl-1) vvv[i]=(*this)[i]; return vvv; //} operator vector>(){ vector> v(xl); rep(i,0,xl-1) v[i]=(*this)[i]; return v; } auto begin(){ return view2dIter(this,0); } auto end(){ return view2dIter(this,xl*yl); } #if defined(_DEBUG) void dump(){ ::dump(tovv()); } #endif /*---- view設定 ----*/ view2d &dmy(R dmy_) { dummy=dmy_; return *this; }//ダミー値セット template view2d &st(Q... s_){//始点set 負は末尾からの位置 this->s=RevIfNeg(view1d::SllD(s_...)); this->xl=view1d::AutoLen(this->s,this->dx,this->dsize); this->yl=view1d::AutoLen(this->s,this->dy,this->dsize); return *this; } template view2d &dirx(Q... d_){//x軸set、長さはdata端まで this->dx=view1d::SllD(d_...); this->xl=view1d::AutoLen(this->s,this->dx,this->dsize); return *this; } template view2d &diry(Q... d_){//y軸set、長さはdata端まで this->dy=view1d::SllD(d_...); this->yl=view1d::AutoLen(this->s,this->dy,this->dsize); return *this; } template view2d &mv(Q... s_){//平行移動 this->s += view1d::SllD(s_...); return *this; } view2d &lenx(ll xl_) { xl=xl_; return *this; } view2d &leny(ll yl_) { yl=yl_; return *this; } view2d &shape(ll xl_,ll yl_) { xl=xl_; yl=yl_; return *this; } template view2d &shape(Q &v) { xl=v.lenx(); yl=v.leny(); return *this; } view2d &rot90 () { s+=dx*(xl-1); swap(xl,yl); swap(dx,dy); dy*=-1; return *this; } view2d &rot270() { s+=dy*(yl-1); swap(xl,yl); swap(dx,dy); dx*=-1; return *this; } view2d &rot180() { s+=dx*(xl-1)+dy*(yl-1); dx*=-1; dy*=-1; return *this; } view2d &revx() { s+=dx*(xl-1); dx*=-1; return *this; } view2d &revy() { s+=dy*(yl-1); dy*=-1; return *this; } view2d &swapxy() { swap(xl,yl); swap(dx,dy); return *this; }//xy軸入替 /*---- utility ----*/ Sll RevIfNeg(Sll pos){//!< 負なら末尾からの位置に変換 rep(i,0,S-1) if (pos[i]<0) pos[i]+=dsize[i]; return pos; } using value_type = R; }; template view2d( VVV) -> view2d< VVV,3,T>; template view2d( VV) -> view2d< VV,2,T>; ; view2d(VV) -> view2d,3,char>; ; view2d( V) -> view2d< V,2,char>; /* zipは参照のpairを返す。それをさらに参照するのはまずいので、コピーする。 */ template struct zipIter{ ZIP *z=nullptr; ll idx=INF; zipIter(){} zipIter(ZIP *z_,ll idx_):z(z_),idx(idx_){} zipIter(const zipIter &it):z(it.z),idx(it.idx){} auto operator*() { return (*z)[idx]; }//参照ではなく値戻し auto operator*() const{ return (*z)[idx]; }//同上 auto operator[](ll i) { return (*z)[idx+i]; }//同上 auto operator[](ll i)const{ return (*z)[idx+i]; }//同上 auto &operator++(){ idx++; return *this; } auto &operator--(){ idx--; return *this; } auto operator++(int){ auto it=*this; idx++; return it; } auto operator--(int){ auto it=*this; idx--; return it; } auto &operator+=(ll n){ idx+=n; return *this; } auto &operator-=(ll n){ idx-=n; return *this; } auto operator+(ll n){ auto it=*this; return it+=n; } auto operator-(ll n){ auto it=*this; return it-=n; } ll operator- (const zipIter &it)const{ return idx- it.idx; } bool operator< (const zipIter &it)const{ return idx< it.idx; } bool operator> (const zipIter &it)const{ return idx> it.idx; } bool operator<=(const zipIter &it)const{ return idx<=it.idx; } bool operator>=(const zipIter &it)const{ return idx>=it.idx; } bool operator!=(const zipIter &it)const{ return idx!=it.idx; } bool operator==(const zipIter &it)const{ return idx==it.idx; } using iterator_category = random_access_iterator_tag; using value_type = typename ZIP::value_type; using difference_type = ll; using pointer = value_type*; using reference = value_type&; }; template struct zip2{ T &t; S &s; zip2(T &t_,S &s_):t(t_),s(s_){} ll size() const { return t.end()-t.begin(); } auto operator[](ll i) { return make_pair(ref(t.begin()[i]),ref(s.begin()[i])); } auto operator[](ll i)const{ return make_pair(ref(t.begin()[i]),ref(s.begin()[i])); } auto begin(){ return zipIter(this,0); } auto end(){ return zipIter(this,size()); } using value_type = pair; }; template struct zip3{ T &t; S &s; R &r; zip3(T &t_,S &s_,R &r_):t(t_),s(s_),r(r_){} ll size() const { return t.end()-t.begin(); } auto operator[](ll i) { return make_tuple(ref(t.begin()[i]),ref(s.begin()[i]),ref(r.begin()[i])); } auto operator[](ll i)const{ return make_tuple(ref(t.begin()[i]),ref(s.begin()[i]),ref(r.begin()[i])); } auto begin(){ return zipIter(this,0); } auto end(){ return zipIter(this,size()); } using value_type = tuple; }; #if 0 #define MODLL (1000000007LL) #else #define MODLL (998244353LL) #endif using mll = mll_; using vmll = std::vector; using vvmll = std::vector; using vvvmll = std::vector; using vvvvmll = std::vector; ////////////////////////////////////////// struct combination{ vmll f,g; ll mxN=0; combination(){} combination(ll maxN): f(maxN+1,1),g(maxN+1),mxN(maxN) { for (ll i=1;i<=mxN;++i) { f[i]=f[i-1]*i; } g[mxN]=1/f[mxN]; for (ll i=mxN;i>=1;--i) { g[i-1]=g[i]*i; } } mll P(ll n,ll r){ return (n<0 || r<0 || n inline T POW(T a,ll n){ T r=1; for (; n>0; n>>=1,a*=a){ if (n&1)r*=a; } return r; } inline ll POW(int a,ll n){ return POW((ll)a,n); } struct Bitset{ using ull = unsigned long long; vector v; static const ll B=64; Bitset(){} Bitset(ll n):v((n+B-1)/B){} bool empty(){ trim(); return v.empty(); } ll Block(ll i)const{ return i>>6; } ll Pos(ll i)const{ return i&0x3f; } pll BlockPos(ll i)const{ return {Block(i),Pos(i)}; } ull rangemask(ll posL,ll posR){ return (1ULL<=BlNm()) return false; return (v[blo]>>Pos(i))&1; } Bitset &on(ll i){ ll blo=Block(i); if (blo>=BlNm()) v.resize(blo+1); v[blo] |= 1LL<=BlNm()) v.resize(blo+1); v[blo] ^= 1LL<=r if (l=BlNm()) v.resize(bloL+1); if (bloL==bloR) v[bloL]|=rangemask(posL,posR); else{ v[bloL]|=rangemask(posL,0); for (ll blo=bloL-1;blo>=bloR+1;--blo) v[blo]=(ull)-1; v[bloR]|=rangemask(63,posR); } return *this; } Bitset &off(ll l,ll r){//l>=r if (l=BlNm()) return *this; if (bloL>=BlNm()) bloL=BlNm()-1,posL=63; if (bloL==bloR) v[bloL]&=~rangemask(posL,posR); else{ v[bloL]&=~rangemask(posL,0); for (ll blo=bloL-1;blo>=bloR+1;--blo) v[blo]=0; v[bloR]&=~rangemask(63,posR); } return *this; } Bitset &flip(ll l,ll r){//l>=r if (l=BlNm()) v.resize(bloL+1); if (bloL==bloR) v[bloL]^=rangemask(posL,posR); else{ v[bloL]^=rangemask(posL,0); for (ll blo=bloL-1;blo>=bloR+1;--blo) v[blo]=~v[blo]; v[bloR]^=rangemask(63,posR); } return *this; } Bitset &operator|=(const Bitset &b){ ll minsize=min(BlNm(),b.BlNm()); for (ll i=0;i(e).count(); return cnt; } vll idxes()const{ vll is; for (ll i=0;i(const Bitset &b)const{ /*trim(), b.trim();*/ return v>b.v; } bool operator<=(const Bitset &b)const{ /*trim(), b.trim();*/ return v<=b.v; } bool operator>=(const Bitset &b)const{ /*trim(), b.trim();*/ return v>=b.v; } void dumpbit(ll w=-1)const{//2進数形式でダンプ if (w==-1) w=BlNm()*B; string s="["; rep(i,0,w-1) s+='0'+(char)(*this)[i]; cout << s+"]" << '\n'; } void dumpset()const{//集合形式でダンプ cout << '[' << idxes() << ']' << '\n'; } }; /* Bitset b; Bitset b(n); //予めnbit分確保 bool x=b[i]; //第ibitを得る b.on(200,10).off(37,34).flip(3,0); //第200~10bitを1に、等 ll c=b.count(); //1の数 vll idxes=b.idxes(); //1のidxのvll ex.{2,33,105,279} */ struct bll{ //第0~62bitまで対応 ll s; bll(ll s_=0): s(s_){} struct ref { bll &b; const ll msk; ref(bll &b_,ll pos):b(b_),msk(1LL<>pos)&1; } bll &operator=(ll b){ s=b; return *this; } bll operator++(int){ bll b(*this); s++; return b; } bll operator--(int){ bll b(*this); s--; return b; } operator ll() const noexcept { return s; } bll &on(ll l,ll r){ s|= rangemask(l,r); return *this; } bll &off(ll l,ll r){ s&=~rangemask(l,r); return *this; } bll &flip(ll l,ll r){ s^= rangemask(l,r); return *this; } bll &on(ll i){ s|= (1LL<(s).count(); } vll idxes()const{ vll v; for (ll i=0,t=s; t; t>>=1,i++) if (t&1)v.push_back(i); return v; } }; /* bll b(s); b[3]=1; //第3bitを1に b.on(4,7).off(9,59).flip(0,3); //第4~7bitを1に、等 b.s+=10; //普通に数値として扱いたい時 //0000001000101100 b ll c=b.msb(); //0000001000000000 b.msb() ll c=b.msbit(); // ^第9bit b.msbit() ll c=b.lsb(); //0000000000000100 b.lsb() ll c=b.lsbit(); // 第2bit^ b.lsbit() ll c=b.count(); //1の数 (4個) vll idxes=b.idxes(); //1のidxのvll {2,3,5,9} */ void cin2solve() { ll n,m; cin >> n >> m; vvll a(m); rep(t,0,m-1){ ll l; cin >> l; vector aa; rep(i,0,l-1){ ll aa__; cin>>aa__; aa.push_back(aa__-1); } a[t].swap(aa); } vector bv; for (auto&& e: a){ Bitset b; for (auto&& idx: e) b.on(idx); bv.push_back(move(b)); } //vector cv; set cv; Bitset c; c.on(n-1,0); cv.insert(move(c)); for (auto&& b: bv){ Bitset bb=b; bb.flip(n-1,0); set tmp; for (auto&& c: cv){ Bitset cc=c; cc&=b; Bitset ccc=c; ccc&=bb; if (!cc. empty()) tmp.insert(move(cc)); if (!ccc.empty()) tmp.insert(move(ccc)); } cv.swap(tmp); } mll ans=POW(mll(2),sz(cv)); cout << ans << '\n'; return; } ////////////////////////////////////////// int main(){ #if 1 cin2solve(); //generand(); #else ll t; cin >> t; rep(i,0,t-1){ cin2solve(); //generand(); } #endif cerr << timeget() <<"ms"<< '\n'; return 0; }