#if !defined(MYLOCAL)//提出時用テンプレート #pragma GCC optimize("Ofast") #if defined(NDEBUG) #undef NDEBUG #endif #include "bits/stdc++.h" #if !defined(_MSC_VER) && __has_include() #include using namespace atcoder; #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; 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 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 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; }; #endif//テンプレートend #if defined(_MSC_VER) && __has_include() #include using namespace atcoder; #endif struct{ system_clock::time_point st = system_clock::now(); ll operator()()const{return duration_cast(system_clock::now()-st).count()/1000;} } timeget; ////////////////////////////////////////// template struct mll_{ using Int = long long; using ll = long long; ll val_=0; /*---- utility ----*/ mll_ &norm(){ return normR().normS(); }//正規化 mll_ &normR(){ val_%=MOD; return *this; }//剰余正規化のみ mll_ &normS(){ if (val_<0) val_+=MOD; return *this; }//正負正規化のみ mll_ &normP(){ if (val_>=MOD) val_-=MOD; return *this; }//加算時正規化 mll_ &invsg(){ val_=-val_; return normS(); }//正負反転 ll modinv(int a){//a^-1 mod MOD int ypre=0,y=1,apre=MOD; while (a>1){ int t=apre/a; apre-=a*t,swap(a,apre); ypre-=y*t,swap(y,ypre); } return y<0 ? y+MOD: y; } /*---- I/F ----*/ mll_(){} mll_(ll v): val_(v){ norm(); } mll_(ll v,bool b): val_(v){} //正規化無のコンストラクタ Int val()const{ return (Int)val_; } bool isnone() const { return val_==-1; } //true:値なし mll_ &none() { val_=-1; return *this; } //値なしにする mll_ &inv(){ val_=modinv((int)val_); return *this; } mll_ &operator+=(mll_ b){ val_+=b.val_; return normP(); } mll_ &operator-=(mll_ b){ val_-=b.val_; return normS(); } mll_ &operator*=(mll_ b){ val_*=b.val_; return normR(); } mll_ &operator/=(mll_ b){ return *this*=b.inv(); } 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); } mll_ operator-()const{ return mll_(*this).invsg(); } mll_ operator+(mll_ b)const{ return mll_(*this)+=b; } mll_ operator-(mll_ b)const{ return mll_(*this)-=b; } mll_ operator*(mll_ b)const{ return mll_(*this)*=b; } mll_ operator/(mll_ b)const{ return mll_(*this)/=b; } mll_ operator+(ll b)const{ return mll_(*this)+=b; } mll_ operator-(ll b)const{ return mll_(*this)-=b; } mll_ operator*(ll b)const{ return mll_(*this)*=b; } mll_ operator/(ll b)const{ return mll_(*this)/=b; } friend mll_ operator+(ll a,mll_ b){ return b+a; } friend mll_ operator-(ll a,mll_ b){ return -b+a; } friend mll_ operator*(ll a,mll_ b){ return b*a; } friend mll_ operator/(ll a,mll_ b){ return mll_(a)/b; } bool operator==(mll_ b)const{ return val_==b.val_; } bool operator!=(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,mll_ b){ return mll_(a)==b; } friend bool operator!=(ll a,mll_ b){ return mll_(a)!=b; } friend ostream &operator<<(ostream &os,mll_ a){ return os << a.val_; } friend istream &operator>>(istream &is,mll_ &a){ return is >> a.val_; } mll_ pow(ll k)const{ mll_ ret(1,false),a(*this); for (; k>0; k>>=1,a*=a) if (k&1)ret*=a; return ret; } static constexpr int mod() { return MOD; } //enum{ modll=MOD }; }; #if 0 template struct mll_{ using ll = long long; ll val=0; /*---- utility ----*/ mll_ &norm(){ return normR().normS(); }//正規化 mll_ &normR(){ val%=MOD; return *this; }//剰余正規化のみ mll_ &normS(){ if (val<0) val+=MOD; return *this; }//正負正規化のみ mll_ &normP(){ if (val>=MOD) val-=MOD; return *this; }//加算時正規化 mll_ &invsg(){ val=-val; return normS(); }//正負反転 ll modinv(int a){//a^-1 mod MOD int ypre=0,y=1,apre=MOD; while (a>1){ int t=apre/a; apre-=a*t,swap(a,apre); ypre-=y*t,swap(y,ypre); } return y<0 ? y+MOD: y; } /*---- I/F ----*/ mll_(){} mll_(ll v): val(v){ norm(); } mll_(ll v,bool b): val(v){} //正規化無のコンストラクタ bool isnone() const { return val==-1; } //true:値なし mll_ &none() { val=-1; return *this; } //値なしにする mll_ &inv(){ val=modinv((int)val); return *this; } mll_ &operator+=(mll_ b){ val+=b.val; return normP(); } mll_ &operator-=(mll_ b){ val-=b.val; return normS(); } mll_ &operator*=(mll_ b){ val*=b.val; return normR(); } mll_ &operator/=(mll_ b){ return *this*=b.inv(); } 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); } mll_ operator-()const{ return mll_(*this).invsg(); } mll_ operator+(mll_ b)const{ return mll_(*this)+=b; } mll_ operator-(mll_ b)const{ return mll_(*this)-=b; } mll_ operator*(mll_ b)const{ return mll_(*this)*=b; } mll_ operator/(mll_ b)const{ return mll_(*this)/=b; } mll_ operator+(ll b)const{ return mll_(*this)+=b; } mll_ operator-(ll b)const{ return mll_(*this)-=b; } mll_ operator*(ll b)const{ return mll_(*this)*=b; } mll_ operator/(ll b)const{ return mll_(*this)/=b; } friend mll_ operator+(ll a,mll_ b){ return b+a; } friend mll_ operator-(ll a,mll_ b){ return -b+a; } friend mll_ operator*(ll a,mll_ b){ return b*a; } friend mll_ operator/(ll a,mll_ b){ return mll_(a)/b; } bool operator==(mll_ b)const{ return val==b.val; } bool operator!=(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,mll_ b){ return mll_(a)==b; } friend bool operator!=(ll a,mll_ b){ return mll_(a)!=b; } friend ostream &operator<<(ostream &os,mll_ a){ return os << a.val; } friend istream &operator>>(istream &is,mll_ &a){ return is >> a.val; } mll_ pow(ll k)const{ mll_ ret(1,false),a(*this); for (; k>0; k>>=1,a*=a) if (k&1)ret*=a; return ret; } enum{ modll=MOD }; }; #endif #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; template struct Vector: vector{ using Int = long long; using vT=vector; using cvT=const vector; using cT=const T; using vT::vT; //親クラスのコンストラクタの隠蔽を回避 using vT::begin,vT::end,vT::insert,vT::erase; auto it(Int i){ return begin()+i; } auto it(Int i)const{ return begin()+i; } Vector(cvT& b):vT(b){} Vector(vT&& b):vT(move(b)){} Vector(Int n,T s,T d){ iota(n,s,d); } template Vector &operator+=(S x){ for (T &e: *this) e+=x; return *this; } template Vector &operator-=(S x){ for (T &e: *this) e-=x; return *this; } template Vector &operator*=(S x){ for (T &e: *this) e*=x; return *this; } template Vector &operator/=(S x){ for (T &e: *this) e/=x; return *this; } template Vector &operator%=(S x){ for (T &e: *this) e%=x; return *this; } template Vector operator+(S x)const{ return Vector(*this)+=x; } template Vector operator-(S x)const{ return Vector(*this)-=x; } template Vector operator*(S x)const{ return Vector(*this)*=x; } template Vector operator/(S x)const{ return Vector(*this)/=x; } template Vector operator%(S x)const{ return Vector(*this)%=x; } Vector operator-()const{ return Vector(*this)*=-1; } template friend Vector operator-(S x,const Vector &a){ return -a+=x; } Int size()const{ return (Int)vT::size(); } Vector &push_back(cT& x){ vT::push_back(x); return *this; } Vector &pop_back(){ vT::pop_back(); return *this; } Vector &push_front(cT& x){ insert(begin(),x); return *this; } Vector &pop_front(){ erase(0); return *this; } Vector &insert(Int i,cT& x){ insert(it(i),x); return *this; } Vector &insert(Int i,cvT& b){ insert(it(i),b.begin(),b.end()); return *this; } Vector &erase(Int i){ erase(it(i)); return *this; } Vector &erase(Int l,Int r){ erase(it(l),it(r+1)); return *this; } Vector &concat(cvT &b){ insert(end(),b.begin(),b.end()); return *this; } Vector &concat(cvT &b,Int n){ for (int i=0;i Vector &sort(Pr pr){ std::sort(begin(),end(),pr); return *this; } Vector &uniq(){ erase(unique(begin(),end()),end()); return *this; } Vector &sortq(){ return sort().uniq(); } Vector &fill(Int l,Int r,cT& x){ std::fill(it(l),it(r+1),x); return *this; } template Vector &iota(Int n,T s=0,S d=1){ vT::resize(n); if (n==0) return *this; (*this)[0]=s; for (int i=1;i Int countif(Pr pr)const{ return Int(count_if(begin(),end(),pr)); } template Int countif(Int l,Int r,Pr pr)const{ return Int(count_if(it(l),it(r+1),pr)); } Int find(cT& x)const{ return Int(std::find(begin(),end(),x)-begin()); } Int find(Int l,Int r,cT& x)const{ return Int(std::find(it(l),it(r+1),x)-begin()); } template Int findif(Pr pr)const{ return Int(find_if(begin(),end(),pr)-begin()); } template Int findif(Int l,Int r,Pr pr)const{ return Int(find_if(it(l),it(r+1),pr)-begin()); } Vector findall(cT& x)const{ return findall(0,size()-1,x); } Vector findall(Int l,Int r,cT& x)const{ return findallif(l,r,[&](cT& y){return y==x;}); } template Vector findallif(Pr pr)const{ return findallif(0,size()-1,pr); } template Vector findallif(Int l,Int r,Pr pr)const{ Vector ret; for (Int i=l;i<=r;++i) if (pr((*this)[i])) ret.push_back(i); return ret; } Int flooridx(cT& x)const{ return Int(upper_bound(begin(),end(),x)-begin()-1); } Int ceilidx(cT& x)const{ return Int(lower_bound(begin(),end(),x)-begin()); } Int leftnmof(cT& x)const{ return flooridx(x)+1; } Int rightnmof(cT& x)const{ return size()-ceilidx(x); } bool contains(cT& x)const{ Int i=flooridx(x); return i>=0 && (*this)[i]==x; } template Int flooridx(cT& x,Pr pr)const{ return Int(upper_bound(begin(),end(),x,pr)-begin()-1); } template Int ceilidx(cT& x,Pr pr)const{ return Int(lower_bound(begin(),end(),x,pr)-begin()); } template Int leftnmof(cT& x,Pr pr)const{ return flooridx(x,pr)+1; } template Int rightnmof(cT& x,Pr pr)const{ return size()-ceilidx(x,pr); } template bool contains(cT& x,Pr pr)const{ Int i=flooridx(x,pr); return i>=0 && (*this)[i]==x; } }; /* vll a={9,8,7},b={1,2,3}; vpll p={{5,3},{7,8},{0,2},}; - -------- 操作系 -------- a+=x a-=x a*=x a/=x a%=x a+x a-x a*x a/x a%x -a x-a //∀i a[i]にxを演算 a.push_front(x); a.push_back(x); a.pop_front(); a.pop_back(); a.insert(i,x); //a[i]にx挿入 a.insert(i,b); //a[i]にvll b挿入 a.erase(i); //a[i]削除 a.erase(l,r); //区間[l,r]削除 a.concat(b); //aにbを結合 a.concat(b,n); //aにbをn回結合 a.repeat(n); //aをn回繰り返す a.reverse(); //反転 a.sort(); //ソート a.rsort(); //逆順ソート p.sort([&](pll x,pll y){return x.second0; }; //検索条件 ll m=a.count(x); //xの個数 ll m=a.count(l,r,x); //xの個数in[l,r] ll m=a.countif(pr); //条件満たす個数 ll m=a.countif(l,r,pr); //条件満たす個数in[l,r] ll i=a.find(x); //xの最左位置i ない時N(配列長) ll i=a.find(l,r,x); //xの最左位置i in[l,r] ない時r+1 ll i=a.findif(pr); //条件満たす最左位置i ない時N(配列長) ll i=a.findif(l,r,pr); //条件満たす最左位置i in[l,r] ない時r+1 vll is=a.findall(x); //xの位置i列挙 vll is=a.findall(l,r,x); //xの位置i列挙in[l,r] vll is=a.findallif(pr); //条件満たす位置i列挙 vll is=a.findallif(l,r,pr); //条件満たす位置i列挙in[l,r] - -------- 昇順sort済み配列用 -------- ll i=a.flooridx(x); //x以下の最近傍位置i ない時-1 ll i=a.ceilidx(x); //x以上の最近傍位置i ない時N(配列長) ll m=a.leftnmof(x); //x以下の個数 ll m=a.rightnmof(x); //x以上の個数 bool b=a.contains(x); //xを含む - -------- 比較関数prでsort済みの配列用 -------- auto pr=[&](auto &x,auto &y){ return x>y; }; //降順ソート時 ll i=a.flooridx(x,pr); //x以左の最近傍位置i ない時-1 ll i=a.ceilidx(x,pr); //x以右の最近傍位置i ない時N(配列長) ll m=a.leftnmof(x,pr); //x以左の個数 ll m=a.rightnmof(x,pr); //x以右の個数 bool b=a.contains(x,pr); //xを含む a.concat(b,n).pop_back().rsort().uniq(); //連続適用できる */ namespace SolvingSpace{ template using vector = Vector; using vll=vector< ll>; using vmll=vector< mll>; using vdd=vector< dd>; using vvll=vector< vll>; using vvmll=vector< vmll>; using vvdd=vector< vdd>; using vvvll=vector< vvll>; using vvvmll=vector< vvmll>; using vvvdd=vector; using vvvvll=vector; using vvvvmll=vector; using vpll=vector< pll>; using vtll=vector< tll>; using vqll=vector< qll>; using vvpll=vector< vpll>; using vvtll=vector< vtll>; using vvqll=vector; struct rndutil{ using Int = long long; mt19937 mt; rndutil(Int seed=0):mt((unsigned int)seed){} Int val(Int a,Int b){ return mt()%(b-a+1)+a; }//[a,b]の乱数 dd dval(){ return (dd)mt()/(1ll<<32); }//[0,1)の浮動小数点乱数 vector ary(Int n,Int a,Int b){//長さnの配列、要素[a,b]内、重複可 vector v(n); for (Int i=0;ival(a,b); return v; } vdd dary(Int n){//長さnの[0,1)の浮動小数点乱数 vdd v(n); for (Int i=0;idval(); return v; } string str(Int n,char cs,char ce){//長さnのstring、使用文字cs~ce、重複可 string str(n,cs); for (Int i=0;ival(0,ce-cs); return str; } vector sample(Int n,Int a,Int b){//長さnの配列、要素[a,b]内、重複無 Int len=b-a+1; assert(n<=len); vector v(len); iota(v.begin(),v.end(),a); for (Int i=0;ival(i,len-1)]); v.resize(n); return v; } template auto sample(const T &v){//1つ選択 return v[val(0,(Int)v.size()-1)]; } template auto samplepop(T &v){//1つ取り出し(末尾swapし削除) Int i=val(0,(Int)v.size()-1); auto ret=v[i]; v[i]=v.back(); v.pop_back(); return ret; } Int weightedSampleCore(const vector &cm){//重み付き乱択 累積和版 Int randval=val(1,cm.back()); return Int(lower_bound(cm.begin(),cm.end(),randval)-cm.begin()); } Int weightedSample(const vector &pr){//重み付き乱択 vector cm=pr; for (Int i=1;i<(Int)cm.size();++i) cm[i]+=cm[i-1]; return weightedSampleCore(cm); } template void shuffle(T &v){//配列や文字列をシャッフル Int n=(Int)v.size(); for (Int i=0;ival(i,n-1)]); } pair range(Int a,Int b,Int m=1){ //[a,b]内閉区間長さm以上 while (true){ Int l=this->val(a,b+1),r=this->val(a,b+1); if (r-l>> graph(Int n){ //単純連結無向グラフ 木に近いものが多め while (true){ vector> uv; UnionFindTree uft(n); for (Int v=0;vval(1,n*(n-1)/2)>=n)continue;//各辺確率n/Mで採用(M:総辺数n(n-1)/2) uv.emplace_back(v,u); uft.Unite(v,u); } if (uft.grpnm()==1) return {(Int)uv.size(),uv}; } } vector> tree(Int n){ //木 vector> uv; UnionFindTree uft(n); while (uft.grpnm()>1){ Int u=this->val(0,n-1),v=this->val(0,n-1); if (uft.Same(u,v)) continue; if (u>v)swap(u,v); uft.Unite(u,v); uv.emplace_back(u,v); } return uv; } struct UnionFindTree{ vector par,rank,size; Int g; UnionFindTree(Int num): par(num),rank(num),size(num,1),g(num){ for (Int i=0;i=(1LL<0; t>>=1,i++) if(t&1) v=Next(v,i); return v; } ll jump2i(ll v,ll i){ return Next(v,i); } //2^i個先 pll find_inv (ll s,ll v){ return Find(s,1, [&](ll u,ll t){ return u<=v&&u!=E; }); } pll find_overv (ll s,ll v){ return Find(s,0, [&](ll u,ll t){ return u<=v&&u!=E; }); } pll rfind_inv (ll s,ll v){ return Find(s,1, [&](ll u,ll t){ return u>=v&&u!=E; }); } pll rfind_overv(ll s,ll v){ return Find(s,0, [&](ll u,ll t){ return u>=v&&u!=E; }); } template pll Find(ll v,bool in,Pr pred){ ll t=0; dep(i,B-1,0){ auto[vB,tB]=Jump2i(i,v,t); if (pred(vB,tB)) {v=vB; t=tB;} //条件内→移動 } return in ? pll{v,t} : Jump2i(0,v,t); } /*---- utility ----*/ pll Jump2i(ll i,ll v,ll t){ return {Next(v,i), t+(1LL< struct SET: set{ using P=set; typename P::iterator it=P::end(); template SET(Args...args): P(args...){} SET(initializer_list a): P(a.begin(),a.end()){} ll size() const { return (ll)P::size(); } bool insert(const T &x){ bool r; tie(it,r)=P::insert(x); return r; } template void insert(It st,It en){ P::insert(st,en); } void insert(initializer_list a){ P::insert(a.begin(),a.end()); } template bool emplace(A&&...a){ bool r; tie(it,r)=P::emplace(a...); return r; } void eraseit(){ it=P::erase(it); } void find(const T &x){ it=P::find(x); } bool contains(const T &x){ return P::count(x)==1; } void lower_bound(const T &x){ it=P::lower_bound(x); } void upper_bound(const T &x){ it=P::upper_bound(x); } bool isend() { return it==P::end(); } T getit() { return *it; } T next() { return *(++it); } T prev() { return *(--it); } bool nextok() { return !isend() && it!=--P::end(); } bool prevok() { return it!=P::begin(); } T front() { return *(it=P::begin()); } T back() { return *(it=--P::end()); } void pop_front(){ front(); eraseit(); } void pop_back(){ back(); eraseit(); } void push_front(const T &x){ it=P::insert(P::begin(),x); } void push_back(const T &x){ it=P::insert(P::end(),x); } void push_out(SET &b){ b.push_front(back()); pop_back(); } void pull_in(SET &b){ push_back(b.front()); b.pop_front(); } }; /* front(), back(), pop_front(), pop_back(), contains(x), push_front(x), push_back(x) ある要素の次、前を連続して得る機能 find(x), next(), prev(), nextok(), prevok() */ struct variable_base_enumerate{ ll n=0; vll bases,i_s; variable_base_enumerate(){} variable_base_enumerate(const vll &bases_): n((ll)bases_.size()),bases(bases_),i_s(n){} vll &get() { return i_s; } bool next(){ for (ll keta=0;keta<=n;++keta){ if (keta==n) return false; ++i_s[keta]; if (i_s[keta]==bases[keta]) i_s[keta]=0; else break; } return true; } }; /* vll bases={3,4,2}; variable_base_enumerate vb(bases); for (bool is=true; is; is=vb.next()){ vll &i_s=vb.get(); //cout << i_s << '\n'; } */ auto solv2( ll n,ll K,vpll &lr ){ vll bases(K,n); variable_base_enumerate vb(bases); ll ans=INF; for (bool is=true; is; is=vb.next()){ vll &i_s=vb.get(); SET st(all(i_s)); if (sz(st)!=sz(i_s))continue; bool isok=true; rep(i,1,sz(i_s)-1){ ll pre=i_s[i-1]; ll cur=i_s[i]; if (lr[pre].second>lr[cur].first) isok=false; } if (!isok)continue; chmin(ans,lr[i_s.back()].second-lr[i_s.front()].first); } if (ans==INF) ans=-1; return ans; } auto solve( ll n,ll K,vpll &lr ){ //あるrに対し、それ以降にlが現れる区間でのr最小 vtll bf; rep(v,0,sz(lr)-1){ auto [l,r]=lr[v]; bf.emplace_back(l,1,v); bf.emplace_back(r,0,v); } bf.rsort(); vll next(n,INF); ll rmin=INF; ll vmin=INF; for (auto&&[lrval,l_r,v]:bf){ if (l_r==1){//l ll rva=lr[v].second; if (chmin(rmin,rva)) vmin=v; } else{ next[v]=vmin; } } dubling dbl(next,n+10); ll ans=INF; rep(v,0,n-1){ ll u=dbl.jump(v,K-1); if (u==INF)continue; ll Lx=lr[v].first; ll Ry=lr[u].second; chmin(ans,Ry-Lx); } if (ans==INF) ans=-1; //cout << ans << '\n'; return ans; } void solvecomp( ll n,ll K,vpll &lr ){ auto coutans=[](auto ans){ /* 出力を書く */ cout << ans << '\n'; }; auto ans=solve( n,K,lr ); coutans(ans); #if 0 cout << "- - - - -\n"; auto an2=solv2( n,K,lr ); coutans(an2); cout << "================\n"; if (ans!=an2){ cout << "============ input =============\n"; /* inputファイルの形式で吐き出す */ cout << pll(n,K) << '\n'; each(e,lr) cout << e << '\n'; cout << "============ input end =========\n\n================\n"; getchar(); rep(i,0,10000000000) i++;//getchar()の代わり } #endif } void cin2solve(){ /* cinからの入力を書く */ ll n,K; cin >> n >> K; vector> lr; rep(i,0,n-1){ ll l; ll r; cin>>l>>r; lr.emplace_back(l,r); } solvecomp( n,K,lr ); } void generand(){ rndutil ru; rep(q,0,INF){ /* 乱数による入力の生成を書く */ ll n=ru.val(1,5); ll K=ru.val(1,5); vpll lr; rep(t,0,n-1){ lr.push_back(ru.range(1,10,2)); } solvecomp( n,K,lr ); } } };//SolvingSpace ////////////////////////////////////////// int main(){ #if 1 //SolvingSpace::labo(); SolvingSpace::cin2solve(); //SolvingSpace::generand(); #else ll t; cin >> t; rep(i,0,t-1){ SolvingSpace::cin2solve(); //SolvingSpace::generand(); } #endif cerr << timeget() <<"ms"<< '\n'; return 0; }