제출 #139268

#제출 시각아이디문제언어결과실행 시간메모리
139268win11905여행하는 상인 (APIO17_merchant)C++11
100 / 100
114 ms4272 KiB
#include <bits/stdc++.h> #define long long long using namespace std; const int N = 105; const int K = 1005; const long INF = 1e9+1; int n, m, k; long b[N][K], s[N][K]; long d1[N][N], d2[N][N], cost[N][N]; void apsp(long d[N][N]) { 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 main() { fill_n(d1[0], N*N, INF); scanf("%d %d %d", &n, &m, &k); for(int i = 1; i <= n; ++i) for(int j = 1; j <= k; ++j) scanf("%lld %lld", &b[i][j], &s[i][j]); for(int i = 1; i <= n; ++i) for(int j = 1; j <= n; ++j) for(int l = 1; l <= k; ++l) if(s[j][l] != -1 && b[i][l] != -1) cost[i][j] = max(cost[i][j], s[j][l] - b[i][l]); for(int i = 0, u, v, w; i < m; ++i) { scanf("%d %d %d", &u, &v, &w); d1[u][v] = w; } apsp(d1); long l = 0, r = 1e9+1; while(l < r) { long m = (l + r + 1) / 2; for(int i = 1; i <= n; ++i) for(int j = 1; j <= n; ++j) d2[i][j] = m * d1[i][j] - cost[i][j]; apsp(d2); bool st = false; for(int i = 1; i <= n; ++i) st |= d2[i][i] <= 0; if(st) l = m; else r = m-1; } printf("%lld\n", l); }

컴파일 시 표준 에러 (stderr) 메시지

merchant.cpp: In function 'int main()':
merchant.cpp:22:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d %d", &n, &m, &k);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
merchant.cpp:25:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%lld %lld", &b[i][j], &s[i][j]);
       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
merchant.cpp:30:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d", &u, &v, &w);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
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