結果
問題 |
No.1112 冥界の音楽
|
ユーザー |
![]() |
提出日時 | 2020-07-11 10:35:58 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 42 ms / 2,000 ms |
コード長 | 2,144 bytes |
コンパイル時間 | 3,029 ms |
コンパイル使用メモリ | 222,588 KB |
最終ジャッジ日時 | 2025-01-11 19:40:46 |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 34 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:69:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 69 | scanf("%d%d%lld", &K, &m, &n); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:72:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 72 | scanf("%d%d%d", &p[i], &q[i], &r[i]); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ソースコード
#pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include <bits/stdc++.h> #define For(i, a, b) for(int (i)=(int)(a); (i)<(int)(b); ++(i)) #define rFor(i, a, b) for(int (i)=(int)(a)-1; (i)>=(int)(b); --(i)) #define rep(i, n) For((i), 0, (n)) #define rrep(i, n) rFor((i), (n), 0) #define fi first #define se second using namespace std; typedef long long lint; typedef unsigned long long ulint; typedef pair<int, int> pii; typedef pair<lint, lint> pll; template<class T> bool chmax(T &a, const T &b){if(a<b){a=b; return true;} return false;} template<class T> bool chmin(T &a, const T &b){if(a>b){a=b; return true;} return false;} template<class T> T div_floor(T a, T b){ if(b < 0) a *= -1, b *= -1; return a>=0 ? a/b : (a+1)/b-1; } template<class T> T div_ceil(T a, T b){ if(b < 0) a *= -1, b *= -1; return a>0 ? (a-1)/b+1 : a/b; } constexpr int mod = 1000000007; //constexpr lint INF = mod * mod; constexpr int MAX = 200010; constexpr int idx[6][6] = { {0, 1, 2, 3, 4, 5}, {6, 7, 8, 9, 10, 11}, {12, 13, 14, 15, 16, 17}, {18, 19, 20, 21, 22, 23}, {24, 25, 26, 27, 28, 29}, {30, 31, 32, 33, 34, 35} }; using mat = array<array<int, 36>, 36>; mat a, c; void mul(mat a, mat b){ int n = 36; rep(i, n)rep(j, n) c[i][j] = 0; rep(i, n){ rep(k, n){ rep(j, n){ c[i][j] += (lint)a[i][k] * b[k][j] % mod; if(c[i][j] >= mod) c[i][j] -= mod; } } } } mat pow(mat a, lint n){ int m = 36; mat b; rep(i, m)rep(j, m) b[i][j] = (i == j); while(n){ if(n & 1) mul(a, b), swap(b, c), --n; else mul(a, a), swap(a, c), n >>= 1; } return b; } int main(){ int K, m; lint n; scanf("%d%d%lld", &K, &m, &n); int p[m], q[m], r[m]; rep(i, m){ scanf("%d%d%d", &p[i], &q[i], &r[i]); --p[i]; --q[i]; --r[i]; } rep(i, m){ a[idx[p[i]][q[i]]][idx[q[i]][r[i]]] = 1; } a = pow(a, n-2); int ans = 0; rep(j, K)rep(s, K){ ans += a[idx[0][j]][idx[s][0]]; if(ans >= mod) ans -= mod; } printf("%d\n", ans); }