// CODE FROM USACO GUIDE, JUST TESTING
#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;
const ll INF = LLONG_MAX / 2;
int n, m, x;
ll b[101][1001], s[101][1001];
ll graph[101][101], profit[101][101], graph2[101][101];
void floyd_warshall(ll adj[101][101]) {
FOR(i, 1, n + 1)
FOR(j, 1, n + 1)
FOR(k, 1, n + 1)
adj[j][k] = min(adj[j][k], adj[j][i] + adj[i][k]);
}
int main() {
iostream::sync_with_stdio(false);
cin.tie(0);
cin >> n >> m >> x;
FOR(i, 1, n + 1) {
FOR(j, 1, n + 1) graph[i][j] = INF;
FOR(j, 1, x + 1) cin >> b[i][j] >> s[i][j];
}
FOR(i, 0, m) {
int u, v, w;
cin >> u >> v >> w;
graph[u][v] = w;
}
floyd_warshall(graph);
FOR(i, 1, n + 1)
FOR(j, 1, n + 1)
FOR(k, 1, x + 1)
if (s[j][k] != -1 && b[i][k] != -1)
profit[i][j] = max(profit[i][j], s[j][k] - b[i][k]);
ll l = 1, r = 1e9;
while (l <= r) {
ll mid = (l + r) / 2;
FOR(i, 1, n + 1)
FOR(j, 1, n + 1)
graph2[i][j] = mid * min(graph[i][j], INF / mid) - profit[i][j];
floyd_warshall(graph2);
bool has_nonnegative_cycle = false;
FOR(i, 1, n + 1) if (graph2[i][i] <= 0) has_nonnegative_cycle = true;
if (has_nonnegative_cycle) l = mid + 1;
else r = mid - 1;
}
cout << r;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
44 ms |
2140 KB |
Output is correct |
| 2 |
Correct |
26 ms |
1368 KB |
Output is correct |
| 3 |
Correct |
28 ms |
1372 KB |
Output is correct |
| 4 |
Correct |
4 ms |
860 KB |
Output is correct |
| 5 |
Correct |
4 ms |
860 KB |
Output is correct |
| 6 |
Correct |
4 ms |
860 KB |
Output is correct |
| 7 |
Correct |
4 ms |
860 KB |
Output is correct |
| 8 |
Correct |
0 ms |
600 KB |
Output is correct |
| 9 |
Correct |
4 ms |
860 KB |
Output is correct |
| 10 |
Correct |
4 ms |
860 KB |
Output is correct |
| 11 |
Correct |
4 ms |
860 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
4 ms |
856 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
860 KB |
Output is correct |
| 2 |
Correct |
4 ms |
860 KB |
Output is correct |
| 3 |
Correct |
0 ms |
600 KB |
Output is correct |
| 4 |
Correct |
4 ms |
860 KB |
Output is correct |
| 5 |
Correct |
4 ms |
860 KB |
Output is correct |
| 6 |
Correct |
4 ms |
860 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Correct |
4 ms |
856 KB |
Output is correct |
| 9 |
Correct |
6 ms |
860 KB |
Output is correct |
| 10 |
Correct |
4 ms |
860 KB |
Output is correct |
| 11 |
Correct |
4 ms |
860 KB |
Output is correct |
| 12 |
Correct |
4 ms |
860 KB |
Output is correct |
| 13 |
Correct |
4 ms |
856 KB |
Output is correct |
| 14 |
Correct |
1 ms |
344 KB |
Output is correct |
| 15 |
Correct |
4 ms |
860 KB |
Output is correct |
| 16 |
Correct |
4 ms |
856 KB |
Output is correct |
| 17 |
Correct |
4 ms |
860 KB |
Output is correct |
| 18 |
Correct |
4 ms |
924 KB |
Output is correct |
| 19 |
Correct |
4 ms |
1112 KB |
Output is correct |
| 20 |
Correct |
5 ms |
1116 KB |
Output is correct |
| 21 |
Correct |
4 ms |
856 KB |
Output is correct |
| 22 |
Correct |
4 ms |
860 KB |
Output is correct |
| 23 |
Correct |
5 ms |
860 KB |
Output is correct |
| 24 |
Correct |
4 ms |
860 KB |
Output is correct |
| 25 |
Correct |
4 ms |
860 KB |
Output is correct |
| 26 |
Correct |
1 ms |
344 KB |
Output is correct |
| 27 |
Correct |
4 ms |
860 KB |
Output is correct |
| 28 |
Correct |
4 ms |
860 KB |
Output is correct |
| 29 |
Correct |
4 ms |
860 KB |
Output is correct |
| 30 |
Correct |
4 ms |
860 KB |
Output is correct |
| 31 |
Correct |
5 ms |
860 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
860 KB |
Output is correct |
| 2 |
Correct |
1 ms |
344 KB |
Output is correct |
| 3 |
Correct |
4 ms |
860 KB |
Output is correct |
| 4 |
Correct |
4 ms |
860 KB |
Output is correct |
| 5 |
Correct |
4 ms |
860 KB |
Output is correct |
| 6 |
Correct |
4 ms |
860 KB |
Output is correct |
| 7 |
Correct |
5 ms |
860 KB |
Output is correct |
| 8 |
Correct |
29 ms |
1628 KB |
Output is correct |
| 9 |
Correct |
62 ms |
2108 KB |
Output is correct |
| 10 |
Correct |
28 ms |
1372 KB |
Output is correct |
| 11 |
Correct |
29 ms |
1628 KB |
Output is correct |
| 12 |
Correct |
29 ms |
1628 KB |
Output is correct |
| 13 |
Correct |
28 ms |
1372 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
860 KB |
Output is correct |
| 2 |
Correct |
4 ms |
860 KB |
Output is correct |
| 3 |
Correct |
4 ms |
860 KB |
Output is correct |
| 4 |
Correct |
4 ms |
860 KB |
Output is correct |
| 5 |
Correct |
4 ms |
856 KB |
Output is correct |
| 6 |
Correct |
1 ms |
344 KB |
Output is correct |
| 7 |
Correct |
4 ms |
860 KB |
Output is correct |
| 8 |
Correct |
4 ms |
856 KB |
Output is correct |
| 9 |
Correct |
4 ms |
860 KB |
Output is correct |
| 10 |
Correct |
4 ms |
924 KB |
Output is correct |
| 11 |
Correct |
4 ms |
1112 KB |
Output is correct |
| 12 |
Correct |
5 ms |
1116 KB |
Output is correct |
| 13 |
Correct |
4 ms |
856 KB |
Output is correct |
| 14 |
Correct |
4 ms |
860 KB |
Output is correct |
| 15 |
Correct |
5 ms |
860 KB |
Output is correct |
| 16 |
Correct |
4 ms |
860 KB |
Output is correct |
| 17 |
Correct |
29 ms |
1628 KB |
Output is correct |
| 18 |
Correct |
62 ms |
2108 KB |
Output is correct |
| 19 |
Correct |
28 ms |
1372 KB |
Output is correct |
| 20 |
Correct |
29 ms |
1628 KB |
Output is correct |
| 21 |
Correct |
29 ms |
1628 KB |
Output is correct |
| 22 |
Correct |
28 ms |
1372 KB |
Output is correct |
| 23 |
Correct |
4 ms |
860 KB |
Output is correct |
| 24 |
Correct |
1 ms |
344 KB |
Output is correct |
| 25 |
Correct |
4 ms |
860 KB |
Output is correct |
| 26 |
Correct |
4 ms |
860 KB |
Output is correct |
| 27 |
Correct |
4 ms |
860 KB |
Output is correct |
| 28 |
Correct |
4 ms |
860 KB |
Output is correct |
| 29 |
Correct |
5 ms |
860 KB |
Output is correct |
| 30 |
Correct |
44 ms |
2140 KB |
Output is correct |
| 31 |
Correct |
26 ms |
1368 KB |
Output is correct |
| 32 |
Correct |
28 ms |
1372 KB |
Output is correct |
| 33 |
Correct |
4 ms |
860 KB |
Output is correct |
| 34 |
Correct |
4 ms |
860 KB |
Output is correct |
| 35 |
Correct |
4 ms |
860 KB |
Output is correct |
| 36 |
Correct |
4 ms |
860 KB |
Output is correct |
| 37 |
Correct |
0 ms |
600 KB |
Output is correct |
| 38 |
Correct |
4 ms |
860 KB |
Output is correct |
| 39 |
Correct |
4 ms |
860 KB |
Output is correct |
| 40 |
Correct |
4 ms |
860 KB |
Output is correct |
| 41 |
Correct |
1 ms |
348 KB |
Output is correct |
| 42 |
Correct |
4 ms |
856 KB |
Output is correct |
| 43 |
Correct |
27 ms |
1372 KB |
Output is correct |
| 44 |
Correct |
29 ms |
1624 KB |
Output is correct |
| 45 |
Correct |
41 ms |
2732 KB |
Output is correct |
| 46 |
Correct |
29 ms |
1624 KB |
Output is correct |
| 47 |
Correct |
29 ms |
1628 KB |
Output is correct |
| 48 |
Correct |
28 ms |
1628 KB |
Output is correct |
| 49 |
Correct |
72 ms |
4180 KB |
Output is correct |
| 50 |
Correct |
0 ms |
348 KB |
Output is correct |
| 51 |
Correct |
0 ms |
348 KB |
Output is correct |
| 52 |
Correct |
27 ms |
1368 KB |
Output is correct |
| 53 |
Correct |
28 ms |
1372 KB |
Output is correct |
| 54 |
Correct |
28 ms |
1588 KB |
Output is correct |
| 55 |
Correct |
27 ms |
1368 KB |
Output is correct |
| 56 |
Correct |
27 ms |
1368 KB |
Output is correct |
| 57 |
Correct |
1 ms |
348 KB |
Output is correct |
| 58 |
Correct |
5 ms |
1000 KB |
Output is correct |
| 59 |
Correct |
7 ms |
1116 KB |
Output is correct |
| 60 |
Correct |
5 ms |
1116 KB |
Output is correct |
| 61 |
Correct |
70 ms |
4220 KB |
Output is correct |
| 62 |
Correct |
70 ms |
4180 KB |
Output is correct |
| 63 |
Correct |
1 ms |
344 KB |
Output is correct |
