제출 #556672

#제출 시각아이디문제언어결과실행 시간메모리
556672hollwo_pelw여행하는 상인 (APIO17_merchant)C++17
100 / 100
96 ms3340 KiB
#include <bits/stdc++.h> // #include <ext/pb_ds/assoc_container.hpp> // #include <ext/pb_ds/trie_policy.hpp> // #include <ext/rope> using namespace std; // using namespace __gnu_cxx; // using namespace __gnu_pbds; void Hollwo_Pelw(); signed main(){ #ifndef hollwo_pelw_local if (fopen("hollwo_pelw.inp", "r")) assert(freopen("hollwo_pelw.inp", "r", stdin)), assert(freopen("hollwo_pelw.out", "w", stdout)); #else using namespace chrono; auto start = steady_clock::now(); #endif cin.tie(0), cout.tie(0) -> sync_with_stdio(0); int testcases = 1; // cin >> testcases; for (int test = 1; test <= testcases; test++){ // cout << "Case #" << test << ": "; Hollwo_Pelw(); } #ifdef hollwo_pelw_local auto end = steady_clock::now(); cout << "\nExcution time : " << duration_cast<milliseconds> (end - start).count() << "[ms]" << endl; #endif } const int N = 105, K = 1005, inf = 1e9 + 7; const long long linf = 4e18; int n, m, k, b[N][K], s[N][K], d[N][N], c[N][N]; long long f[N][N]; void Hollwo_Pelw(){ cin >> n >> m >> k; for (int i = 1; i <= n; i++) for (int j = 1; j <= k; j++) cin >> b[i][j] >> s[i][j]; for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) for (int _ = 1; _ <= k; _++) if (s[j][_] >= 0 && b[i][_] >= 0) c[i][j] = max(c[i][j], s[j][_] - b[i][_]); for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) d[i][j] = i == j ? 0 : inf; for (int u, v, w; m --; ) cin >> u >> v >> w, d[u][v] = w; for (int k = 1; k <= n; k++) for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) d[i][j] = min(d[i][j], d[i][k] + d[k][j]); int l = 0, r = 1e9 + 7; while (l < r) { int m = (l + r + 1) >> 1, ok = 0; for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) { f[i][j] = d[i][j] == inf || i == j ? linf : 1ll * d[i][j] * m - c[i][j]; } for (int k = 1; k <= n; k++) for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) f[i][j] = min(f[i][j], f[i][k] + f[k][j]); for (int i = 1; i <= n && !ok; i++) if (f[i][i] <= 0) ok = 1; (ok ? l = m : r = m - 1); } cout << l << '\n'; }
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