結果
問題 | No.1750 ラムドスウイルスの感染拡大-hard |
ユーザー |
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提出日時 | 2021-11-19 21:51:31 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 257 ms / 2,000 ms |
コード長 | 4,468 bytes |
コンパイル時間 | 2,215 ms |
コンパイル使用メモリ | 205,764 KB |
最終ジャッジ日時 | 2025-01-25 20:17:27 |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 30 |
ソースコード
#include <bits/stdc++.h>using namespace std;#define rep(i,a,b) for(int i=(int)(a);i<(int)(b);i++)#define ALL(v) (v).begin(),(v).end()using ll=long long int;const int inf = 0x3fffffff; const ll INF = 0x1fffffffffffffff; const double eps=1e-12;template<typename T>inline bool chmax(T& a,T b){if(a<b){a=b;return 1;}return 0;}template<typename T>inline bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;}template<int mod=998244353>struct fp {int v; static int get_mod(){return mod;}int inv() const{int tmp,a=v,b=mod,x=1,y=0;while(b)tmp=a/b,a-=tmp*b,swap(a,b),x-=tmp*y,swap(x,y);if(x<0){x+=mod;} return x;}fp(ll x=0){init(x%mod+mod);}fp& init(int x){v=(x<mod?x:x-mod); return *this;}fp operator-()const{return fp()-*this;}fp pow(ll t){fp res=1,b=*this; while(t){if(t&1)res*=b;b*=b;t>>=1;} return res;}fp& operator+=(const fp& x){return init(v+x.v);}fp& operator-=(const fp& x){return init(v+mod-x.v);}fp& operator*=(const fp& x){v=ll(v)*x.v%mod; return *this;}fp& operator/=(const fp& x){v=ll(v)*x.inv()%mod; return *this;}fp operator+(const fp& x)const{return fp(*this)+=x;}fp operator-(const fp& x)const{return fp(*this)-=x;}fp operator*(const fp& x)const{return fp(*this)*=x;}fp operator/(const fp& x)const{return fp(*this)/=x;}bool operator==(const fp& x)const{return v==x.v;}bool operator!=(const fp& x)const{return v!=x.v;}}; using Fp=fp<>;template<typename T>struct factorial {vector<T> Fact,Finv,Inv;factorial(int maxx){Fact.resize(maxx); Finv.resize(maxx); Inv.resize(maxx);Fact[0]=Fact[1]=Finv[0]=Finv[1]=Inv[1]=1;rep(i,2,maxx){Fact[i]=Fact[i-1]*i;} Finv[maxx-1]=Fact[maxx-1].inv();for(int i=maxx-1;i>=2;i--){Finv[i-1]=Finv[i]*i; Inv[i]=Finv[i]*Fact[i-1];}}T fact(int n,bool inv=0){if(n<0)return 0; return (inv?Finv[n]:Fact[n]);}T inv(int n){if(n<0)return 0; return Inv[n];}T nPr(int n,int r,bool inv=0){if(n<0||n<r||r<0)return 0; return fact(n,inv)*fact(n-r,inv^1);}T nCr(int n,int r,bool inv=0){if(n<0||n<r||r<0)return 0; return fact(n,inv)*fact(r,inv^1)*fact(n-r,inv^1);}T nHr(int n,int r,bool inv=0){return nCr(n+r-1,r,inv);}};template<class T>struct matrix{int h,w; vector<vector<T>> val; T det;matrix(){}matrix(int n,int m):h(n),w(m),val(vector<vector<T>>(n,vector<T>(m))){}vector<T>& operator[](const int i){return val[i];}matrix& operator+=(const matrix& m){rep(i,0,h)rep(j,0,w)val[i][j]+=m.val[i][j];return *this;}matrix& operator-=(const matrix& m){rep(i,0,h)rep(j,0,w)val[i][j]-=m.val[i][j];return *this;}matrix& operator*=(const matrix& m){matrix<T> res(h,m.w);rep(i,0,h)rep(j,0,m.w)rep(k,0,w)res.val[i][j]+=val[i][k]*m.val[k][j];*this=res; return *this;}matrix operator+(const matrix& m)const{return matrix(*this)+=m;}matrix operator-(const matrix& m)const{return matrix(*this)-=m;}matrix operator*(const matrix& m)const{return matrix(*this)*=m;}matrix pow(ll k){matrix<T> res(h,h),c=*this; rep(i,0,h)res.val[i][i]=1;while(k){if(k&1)res*=c; c*=c; k>>=1;} return res;}vector<int> gauss(int c=-1){if(val.empty())return {};if(c==-1)c=w;int cur=0; vector<int> res; det=1;rep(i,0,c){if(cur==h)break;rep(j,cur,h)if(val[j][i]!=0){swap(val[cur],val[j]);if(cur!=j)det*=-1;break;}det*=val[cur][i];if(val[cur][i]==0)continue;rep(j,0,h)if(j!=cur){T z=val[j][i]/val[cur][i];rep(k,i,w)val[j][k]-=val[cur][k]*z;}res.push_back(i);cur++;}return res;}friend istream& operator>>(istream& is,matrix& m){rep(i,0,m.h)rep(j,0,m.w)is>>m[i][j];return is;}friend ostream& operator<<(ostream& os,matrix& m){rep(i,0,m.h){rep(j,0,m.w)os<<m[i][j]<<(j==m.w-1 and i!=m.h-1?'\n':' ');}return os;}};int main(){int n,m;cin>>n>>m;ll T;cin>>T;matrix<Fp> mat(n,n),base(n,1);rep(_,0,m){int x,y;cin>>x>>y;mat[x][y]=mat[y][x]=1;}base[0][0]=1;base=mat.pow(T)*base;cout<<base[0][0].v<<'\n';return 0;}