結果
問題 | No.907 Continuous Kadomatu |
ユーザー | beet |
提出日時 | 2019-10-11 22:45:33 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 13,137 bytes |
コンパイル時間 | 3,684 ms |
コンパイル使用メモリ | 254,644 KB |
実行使用メモリ | 10,624 KB |
最終ジャッジ日時 | 2024-11-25 08:42:05 |
合計ジャッジ時間 | 48,829 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 345 ms
10,496 KB |
testcase_01 | AC | 345 ms
8,960 KB |
testcase_02 | AC | 344 ms
10,496 KB |
testcase_03 | AC | 345 ms
9,088 KB |
testcase_04 | AC | 346 ms
10,496 KB |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | TLE | - |
testcase_11 | TLE | - |
testcase_12 | TLE | - |
testcase_13 | TLE | - |
testcase_14 | TLE | - |
testcase_15 | TLE | - |
testcase_16 | TLE | - |
testcase_17 | TLE | - |
testcase_18 | TLE | - |
testcase_19 | TLE | - |
testcase_20 | WA | - |
testcase_21 | AC | 354 ms
5,248 KB |
testcase_22 | AC | 357 ms
5,248 KB |
testcase_23 | TLE | - |
testcase_24 | TLE | - |
testcase_25 | AC | 340 ms
5,248 KB |
testcase_26 | AC | 339 ms
5,248 KB |
testcase_27 | AC | 339 ms
5,248 KB |
testcase_28 | AC | 340 ms
5,248 KB |
testcase_29 | AC | 340 ms
9,344 KB |
ソースコード
#include<bits/stdc++.h> using namespace std; using Int = long long; template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;} template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;} struct FastIO{ FastIO(){ cin.tie(0); ios::sync_with_stdio(0); } }fastio_beet; template<typename T,T MOD = 1000000007> struct Mint{ static constexpr T mod = MOD; T v; Mint():v(0){} Mint(signed v):v(v){} Mint(long long t){v=t%MOD;if(v<0) v+=MOD;} Mint pow(long long k){ Mint res(1),tmp(v); while(k){ if(k&1) res*=tmp; tmp*=tmp; k>>=1; } return res; } static Mint add_identity(){return Mint(0);} static Mint mul_identity(){return Mint(1);} Mint inv(){return pow(MOD-2);} Mint& operator+=(Mint a){v+=a.v;if(v>=MOD)v-=MOD;return *this;} Mint& operator-=(Mint a){v+=MOD-a.v;if(v>=MOD)v-=MOD;return *this;} Mint& operator*=(Mint a){v=1LL*v*a.v%MOD;return *this;} Mint& operator/=(Mint a){return (*this)*=a.inv();} Mint operator+(Mint a) const{return Mint(v)+=a;}; Mint operator-(Mint a) const{return Mint(v)-=a;}; Mint operator*(Mint a) const{return Mint(v)*=a;}; Mint operator/(Mint a) const{return Mint(v)/=a;}; Mint operator-() const{return v?Mint(MOD-v):Mint(v);} bool operator==(const Mint a)const{return v==a.v;} bool operator!=(const Mint a)const{return v!=a.v;} bool operator <(const Mint a)const{return v <a.v;} static Mint comb(long long n,int k){ Mint num(1),dom(1); for(int i=0;i<k;i++){ num*=Mint(n-i); dom*=Mint(i+1); } return num/dom; } }; template<typename T,T MOD> constexpr T Mint<T, MOD>::mod; template<typename T,T MOD> ostream& operator<<(ostream &os,Mint<T, MOD> m){os<<m.v;return os;} template<typename V> V compress(V v){ sort(v.begin(),v.end()); v.erase(unique(v.begin(),v.end()),v.end()); return v; } template<typename T> map<T, int> dict(const vector<T> &v){ map<T, int> res; for(int i=0;i<(int)v.size();i++) res[v[i]]=i; return res; } map<char, int> dict(const string &v){ return dict(vector<char>(v.begin(),v.end())); } namespace FFT{ using dbl = double; struct num{ dbl x,y; num(){x=y=0;} num(dbl x,dbl y):x(x),y(y){} }; inline num operator+(num a,num b){ return num(a.x+b.x,a.y+b.y); } inline num operator-(num a,num b){ return num(a.x-b.x,a.y-b.y); } inline num operator*(num a,num b){ return num(a.x*b.x-a.y*b.y,a.x*b.y+a.y*b.x); } inline num conj(num a){ return num(a.x,-a.y); } int base=1; vector<num> rts={{0,0},{1,0}}; vector<int> rev={0,1}; const dbl PI=acosl(-1.0); void ensure_base(int nbase){ if(nbase<=base) return; rev.resize(1<<nbase); for(int i=0;i<(1<<nbase);i++) rev[i]=(rev[i>>1]>>1)+((i&1)<<(nbase-1)); rts.resize(1<<nbase); while(base<nbase){ dbl angle=2*PI/(1<<(base+1)); for(int i=1<<(base-1);i<(1<<base);i++){ rts[i<<1]=rts[i]; dbl angle_i=angle*(2*i+1-(1<<base)); rts[(i<<1)+1]=num(cos(angle_i),sin(angle_i)); } base++; } } void fft(vector<num> &a,int n=-1){ if(n==-1) n=a.size(); assert((n&(n-1))==0); int zeros=__builtin_ctz(n); ensure_base(zeros); int shift=base-zeros; for(int i=0;i<n;i++) if(i<(rev[i]>>shift)) swap(a[i],a[rev[i]>>shift]); for(int k=1;k<n;k<<=1){ for(int i=0;i<n;i+=2*k){ for(int j=0;j<k;j++){ num z=a[i+j+k]*rts[j+k]; a[i+j+k]=a[i+j]-z; a[i+j]=a[i+j]+z; } } } } vector<num> fa; vector<long long> multiply(vector<int> &a,vector<int> &b){ int need=a.size()+b.size()-1; int nbase=0; while((1<<nbase)<need) nbase++; ensure_base(nbase); int sz=1<<nbase; if(sz>(int)fa.size()) fa.resize(sz); for(int i=0;i<sz;i++){ int x=(i<(int)a.size()?a[i]:0); int y=(i<(int)b.size()?b[i]:0); fa[i]=num(x,y); } fft(fa,sz); num r(0,-0.25/sz); for(int i=0;i<=(sz>>1);i++){ int j=(sz-i)&(sz-1); num z=(fa[j]*fa[j]-conj(fa[i]*fa[i]))*r; if(i!=j) fa[j]=(fa[i]*fa[i]-conj(fa[j]*fa[j]))*r; fa[i]=z; } fft(fa,sz); vector<long long> res(need); for(int i=0;i<need;i++) res[i]=fa[i].x+0.5; return res; } }; template<typename T> struct ArbitraryModConvolution{ using dbl=FFT::dbl; using num=FFT::num; vector<T> multiply(vector<T> as,vector<T> bs){ int need=as.size()+bs.size()-1; int sz=1; while(sz<need) sz<<=1; vector<num> fa(sz),fb(sz); for(int i=0;i<(int)as.size();i++) fa[i]=num(as[i].v&((1<<15)-1),as[i].v>>15); for(int i=0;i<(int)bs.size();i++) fb[i]=num(bs[i].v&((1<<15)-1),bs[i].v>>15); fft(fa,sz);fft(fb,sz); dbl ratio=0.25/sz; num r2(0,-1),r3(ratio,0),r4(0,-ratio),r5(0,1); for(int i=0;i<=(sz>>1);i++){ int j=(sz-i)&(sz-1); num a1=(fa[i]+conj(fa[j])); num a2=(fa[i]-conj(fa[j]))*r2; num b1=(fb[i]+conj(fb[j]))*r3; num b2=(fb[i]-conj(fb[j]))*r4; if(i!=j){ num c1=(fa[j]+conj(fa[i])); num c2=(fa[j]-conj(fa[i]))*r2; num d1=(fb[j]+conj(fb[i]))*r3; num d2=(fb[j]-conj(fb[i]))*r4; fa[i]=c1*d1+c2*d2*r5; fb[i]=c1*d2+c2*d1; } fa[j]=a1*b1+a2*b2*r5; fb[j]=a1*b2+a2*b1; } fft(fa,sz);fft(fb,sz); vector<T> cs(need); using ll = long long; for(int i=0;i<need;i++){ ll aa=T(llround(fa[i].x)).v; ll bb=T(llround(fb[i].x)).v; ll cc=T(llround(fa[i].y)).v; cs[i]=T(aa+(bb<<15)+(cc<<30)); } return cs; } }; template<typename T> struct FormalPowerSeries{ using Poly = vector<T>; using Conv = function<Poly(Poly, Poly)>; Conv conv; FormalPowerSeries(Conv conv):conv(conv){} Poly pre(const Poly &as,int deg){ return Poly(as.begin(),as.begin()+min((int)as.size(),deg)); } Poly add(Poly as,Poly bs){ int sz=max(as.size(),bs.size()); Poly cs(sz,T(0)); for(int i=0;i<(int)as.size();i++) cs[i]+=as[i]; for(int i=0;i<(int)bs.size();i++) cs[i]+=bs[i]; return cs; } Poly sub(Poly as,Poly bs){ int sz=max(as.size(),bs.size()); Poly cs(sz,T(0)); for(int i=0;i<(int)as.size();i++) cs[i]+=as[i]; for(int i=0;i<(int)bs.size();i++) cs[i]-=bs[i]; return cs; } Poly mul(Poly as,Poly bs){ return conv(as,bs); } Poly mul(Poly as,T k){ for(auto &a:as) a*=k; return as; } // F(0) must not be 0 Poly inv(Poly as,int deg){ assert(as[0]!=T(0)); Poly rs({T(1)/as[0]}); for(int i=1;i<deg;i<<=1) rs=pre(sub(add(rs,rs),mul(mul(rs,rs),pre(as,i<<1))),i<<1); return rs; } // not zero Poly div(Poly as,Poly bs){ while(as.back()==T(0)) as.pop_back(); while(bs.back()==T(0)) bs.pop_back(); if(bs.size()>as.size()) return Poly(); reverse(as.begin(),as.end()); reverse(bs.begin(),bs.end()); int need=as.size()-bs.size()+1; Poly ds=pre(mul(as,inv(bs,need)),need); reverse(ds.begin(),ds.end()); return ds; } // F(0) must be 1 Poly sqrt(Poly as,int deg){ assert(as[0]==T(1)); T inv2=T(1)/T(2); Poly ss({T(1)}); for(int i=1;i<deg;i<<=1){ ss=pre(add(ss,mul(pre(as,i<<1),inv(ss,i<<1))),i<<1); for(T &x:ss) x*=inv2; } return ss; } Poly diff(Poly as){ int n=as.size(); Poly rs(n-1); for(int i=1;i<n;i++) rs[i-1]=as[i]*T(i); return rs; } Poly integral(Poly as){ int n=as.size(); Poly rs(n+1); rs[0]=T(0); for(int i=0;i<n;i++) rs[i+1]=as[i]/T(i+1); return rs; } // F(0) must be 1 Poly log(Poly as,int deg){ return pre(integral(mul(diff(as),inv(as,deg))),deg); } // F(0) must be 0 Poly exp(Poly as,int deg){ Poly f({T(1)}); as[0]+=T(1); for(int i=1;i<deg;i<<=1) f=pre(mul(f,sub(pre(as,i<<1),log(f,i<<1))),i<<1); return f; } Poly partition(int n){ Poly rs(n+1); rs[0]=T(1); for(int k=1;k<=n;k++){ if(1LL*k*(3*k+1)/2<=n) rs[k*(3*k+1)/2]+=T(k%2?-1LL:1LL); if(1LL*k*(3*k-1)/2<=n) rs[k*(3*k-1)/2]+=T(k%2?-1LL:1LL); } return inv(rs,n+1); } Poly bernoulli(int n){ Poly rs(n+1,1); for(int i=1;i<=n;i++) rs[i]=rs[i-1]/T(i+1); rs=inv(rs,n+1); T tmp(1); for(int i=1;i<=n;i++){ tmp*=T(i); rs[i]*=tmp; } return rs; } }; template<typename M> class Enumeration{ private: static vector<M> fact,finv,invs; public: static void init(int n){ n=min<decltype(M::mod)>(n,M::mod-1); int m=fact.size(); if(n<m) return; fact.resize(n+1,1); finv.resize(n+1,1); invs.resize(n+1,1); if(m==0) m=1; for(int i=m;i<=n;i++) fact[i]=fact[i-1]*M(i); finv[n]=M(1)/fact[n]; for(int i=n;i>=m;i--) finv[i-1]=finv[i]*M(i); for(int i=m;i<=n;i++) invs[i]=finv[i]*fact[i-1]; } static M Fact(int n){ init(n); return fact[n]; } static M Finv(int n){ init(n); return finv[n]; } static M Invs(int n){ init(n); return invs[n]; } static M C(int n,int k){ if(n<k||k<0) return M(0); init(n); return fact[n]*finv[n-k]*finv[k]; } static M P(int n,int k){ if(n<k||k<0) return M(0); init(n); return fact[n]*finv[n-k]; } static M H(int n,int k){ if(n<0||k<0) return M(0); if(!n&&!k) return M(1); init(n+k-1); return C(n+k-1,k); } static M S(int n,int k){ init(k); M res(0); for(int i=1;i<=k;i++){ M tmp=C(k,i)*M(i).pow(n); if((k-i)&1) res-=tmp; else res+=tmp; } return res*=finv[k]; } static vector< vector<M> > D(int n,int m){ vector< vector<M> > dp(n+1,vector<M>(m+1,0)); dp[0][0]=M(1); for(int i=0;i<=n;i++){ for(int j=1;j<=m;j++){ if(i-j>=0) dp[i][j]=dp[i][j-1]+dp[i-j][j]; else dp[i][j]=dp[i][j-1]; } } return dp; } static M B(int n,int k){ if(n==0) return M(1); k=min(k,n); init(k); vector<M> dp(k+1); dp[0]=M(1); for(int i=1;i<=k;i++) dp[i]=dp[i-1]+((i&1)?-finv[i]:finv[i]); M res(0); for(int i=1;i<=k;i++) res+=M(i).pow(n)*finv[i]*dp[k-i]; return res; } static M montmort(int n){ init(n); M res(0); for(int k=2;k<=n;k++){ if(k&1) res-=finv[k]; else res+=finv[k]; } return res*=fact[n]; } static M LagrangePolynomial(vector<M> &y,M t){ int n=y.size()-1; if(t.v<=n) return y[t.v]; init(n+1); vector<M> dp(n+1,1),pd(n+1,1); for(int i=0;i<n;i++) dp[i+1]=dp[i]*(t-M(i)); for(int i=n;i>0;i--) pd[i-1]=pd[i]*(t-M(i)); M res(0); for(int i=0;i<=n;i++){ M tmp=y[i]*dp[i]*pd[i]*finv[i]*finv[n-i]; if((n-i)&1) res-=tmp; else res+=tmp; } return res; } }; template<typename M> vector<M> Enumeration<M>::fact=vector<M>(); template<typename M> vector<M> Enumeration<M>::finv=vector<M>(); template<typename M> vector<M> Enumeration<M>::invs=vector<M>(); //INSERT ABOVE HERE signed main(){ int n; cin>>n; vector<int> as(n),bs(n); for(int i=0;i<n;i++) cin>>as[i]>>bs[i]; vector<int> vs; for(int a:as) vs.emplace_back(a); for(int b:bs) vs.emplace_back(b); vs.emplace_back(0); vs.emplace_back(1e9+6); vs=compress(vs); auto dc=dict(vs); int sz=dc.size(); const int MOD = 1e9+7; using M = Mint<int, MOD>; ArbitraryModConvolution<M> arb; FormalPowerSeries<M> FPS([&](auto as,auto bs){return arb.multiply(as,bs);}); using Poly = FormalPowerSeries<M>::Poly; Poly sum; const int deg = 1<<7; for(int l=0;l<deg;l++){ Poly res({M(1)}); Poly bs({M(1),M(1)}); bs=FPS.inv(bs,deg); Poly tmp({M(1)}); for(int i=1;i<=l;i++){ tmp=FPS.pre(FPS.mul(tmp,bs),deg); res=FPS.pre(FPS.mul(res,FPS.sub(Poly({M(1)}),tmp)),deg); } sum=FPS.add(sum,res); } using E = Enumeration<M>; E::init(deg); //for(int i=0;i<10;i++) cout<<sum[i]<<endl; for(int i=0;i<deg;i++) sum[i]*=E::Finv(i); vector< vector<M> > dp(n+1,vector<M>(sz,0)); for(int j=0;j+1<sz;j++) if(as[0]<=vs[j]&&vs[j+1]<=bs[0]) dp[1][j]=M(vs[j+1]-vs[j])/M(bs[0]-as[0]); for(int i=1;i<n;i++){ M rev=M(bs[i]-as[i]).inv(); vector< vector<M> > nx(n+1,vector<M>(sz,0)); if(i&1){ for(int l=1;l<n;l++){ for(int j=0;j+1<sz;j++){ nx[l+1][j]+=dp[l][j]* M(as[i]<=vs[j]&&vs[j+1]<=bs[i])*M(vs[j+1]-vs[j])*rev; for(int k=j+1;k+1<sz;k++) nx[1][k]+=sum[l]*dp[l][j] *M(as[i]<=vs[k]&&vs[k+1]<=bs[i])*M(vs[k+1]-vs[k])*rev; } } }else{ for(int l=1;l<n;l++){ for(int j=0;j+1<sz;j++){ nx[l+1][j]+=dp[l][j]* M(as[i]<=vs[j]&&vs[j+1]<=bs[i])*M(vs[j+1]-vs[j])*rev; for(int k=j-1;k>=0;k--) nx[1][k]+=sum[l]*dp[l][j] *M(as[i]<=vs[k]&&vs[k+1]<=bs[i])*M(vs[k+1]-vs[k])*rev; } } } swap(dp,nx); } M ans{0}; for(int i=1;i<=n;i++) for(int j=0;j+1<sz;j++) ans+=dp[i][j]*sum[i]; if(0){ for(int i=1;i<=n;i++) for(int j=0;j+1<sz;j++) cout<<i<<" "<<j<<":"<<dp[i][j]<<" "<<sum[i]<<endl; } cout<<ans<<endl; return 0; }