結果
問題 | No.1073 無限すごろく |
ユーザー |
![]() |
提出日時 | 2020-06-05 22:04:19 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 2 ms / 2,000 ms |
コード長 | 2,965 bytes |
コンパイル時間 | 1,501 ms |
コンパイル使用メモリ | 171,396 KB |
実行使用メモリ | 6,820 KB |
最終ジャッジ日時 | 2024-12-17 15:06:37 |
合計ジャッジ時間 | 2,434 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 30 |
ソースコード
#include <bits/stdc++.h>int ri() {int n;scanf("%d", &n);return n;}#define MOD 1000000007template<int mod>struct ModInt{int x;ModInt():x(0){}ModInt(long long y):x(y>=0?y%mod:(mod-(-y)%mod)%mod){}ModInt &operator+=(const ModInt &p){if((x+=p.x)>=mod)x-=mod;return *this;}ModInt &operator-=(const ModInt &p){if((x+=mod-p.x)>=mod)x-=mod;return *this;}ModInt &operator*=(const ModInt &p){x=(int)(1LL*x*p.x%mod);return *this;}ModInt &operator/=(const ModInt &p){*this*=p.inverse();return *this;}ModInt &operator^=(long long p){ModInt res = 1;for (; p; p >>= 1) {if (p & 1) res *= *this;*this *= *this;}return *this = res;}ModInt operator-()const{return ModInt(-x);}ModInt operator+(const ModInt &p)const{return ModInt(*this)+=p;}ModInt operator-(const ModInt &p)const{return ModInt(*this)-=p;}ModInt operator*(const ModInt &p)const{return ModInt(*this)*=p;}ModInt operator/(const ModInt &p)const{return ModInt(*this)/=p;}ModInt operator^(long long p)const{return ModInt(*this)^=p;}bool operator==(const ModInt &p)const{return x==p.x;}bool operator!=(const ModInt &p)const{return x!=p.x;}explicit operator int() const { return x; } // added by QCFiumModInt operator=(const int p) {x = p; return ModInt(*this);} // added by QCFiumModInt inverse()const{int a=x,b=mod,u=1,v=0,t;while(b>0){t=a/b;a-=t*b;std::swap(a,b);u-=t*v;std::swap(u,v);}return ModInt(u);}friend std::ostream &operator<<(std::ostream &os,const ModInt<mod> &p){return os<<p.x;}friend std::istream &operator>>(std::istream &is,ModInt<mod> &a){long long x;is>>x;a=ModInt<mod>(x);return (is);}};typedef ModInt<MOD> mint;struct MComb {std::vector<mint> fact;std::vector<mint> inv;MComb (int n) { // O(n + log(mod))fact = std::vector<mint>(n + 1, 1);for (int i = 1; i <= n; i++) fact[i] = fact[i - 1] * mint(i);inv.resize(n + 1);inv[n] = fact[n] ^ (MOD - 2);for (int i = n; i--; ) inv[i] = inv[i + 1] * mint(i + 1);}mint ncr(int n, int r) {return fact[n] * inv[r] * inv[n - r];}mint npr(int n, int r) {return fact[n] * inv[n - r];}mint nhr(int n, int r) {assert(n + r - 1 < (int) fact.size());return ncr(n + r - 1, r);}};int main() {int64_t n;scanf("%" SCNd64, &n);mint mat[6][6];for (int i = 0; i < 6; i++) {if (i) mat[i][i - 1] = 1;else {for (int j = 0; j < 6; j++) mat[i][j] = mint(1) / 6;}}mint res[6] = { 1 };for (auto i = n; i; i >>= 1) {if (i & 1) {mint next[6] = { 0 };for (int j = 0; j < 6; j++) for (int k = 0; k < 6; k++) next[k] += res[j] * mat[j][k];memcpy(res, next, sizeof(next));}mint next[6][6] = { { 0 } };for (int j = 0; j < 6; j++) for (int k = 0; k < 6; k++) for (int l = 0; l < 6; l++) next[j][l] += mat[j][k] * mat[k][l];memcpy(mat, next, sizeof(next));}std::cout << res[0] << std::endl;return 0;}