#include "bits/stdc++.h"
using namespace std;
const int N = 105;
const int K = 1005;
const long long INF = 1e10;
const int MAX_ANS = 1e9 + 1;
int n, m, items;
int buy[N][K], sell[N][K];
long long dist[N][N], profit[N][N];
long long adj[N][N], adj2[N][N];
inline bool check(long long x) {
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
if (dist[i][j] == INF) {
adj[i][j] = -INF;
} else {
adj[i][j] = profit[i][j] - dist[i][j] * x;
adj[i][j] = max(-INF, adj[i][j]);
}
}
adj[i][i] = -INF;
}
long long res = -INF;
for (int k = 1; k <= n; k++) {
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
adj[i][j] = max(adj[i][j], adj[i][k] + adj[k][j]);
res = max(res, adj[i][i]);
if (res >= 0) {
return true;
}
adj[i][j] = min(adj[i][j], INF);
adj2[i][j] = adj[i][j];
}
}
}
for (int k = 1; k <= n; k++) {
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
adj2[i][j] = max(adj2[i][j], adj2[i][k] + adj2[k][j]);
if (adj2[i][j] > adj[i][j]) {
return true;
}
}
}
}
return false;
}
int main() {
ios :: sync_with_stdio(false);
cin >> n >> m >> items;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= items; j++) {
cin >> buy[i][j] >> sell[i][j];
}
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
dist[i][j] = INF;
}
dist[i][i] = 0;
}
for (int i = 1; i <= m; i++) {
int u, v, w; cin >> u >> v >> w;
dist[u][v] = min(dist[u][v], (long long) w);
}
for (int k = 1; k <= n; k++) {
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
dist[i][j] = min(dist[i][j], dist[i][k] + dist[k][j]);
}
}
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
profit[i][j] = 0;
for (int k = 1; k <= items; k++) {
if (buy[i][k] == -1 || sell[j][k] == -1) continue;
profit[i][j] = max(profit[i][j], (long long) sell[j][k] - (long long) buy[i][k]);
}
}
}
long long l = 1, r = MAX_ANS;
long long ans = 0;
while (l <= r) {
long long mid = (l + r) >> 1;
if (check(mid)) {
l = mid + 1;
ans = mid;
} else {
r = mid - 1;
}
}
cout << ans << "\n";
}
Compilation message
merchant.c:1:10: fatal error: bits/stdc++.h: No such file or directory
#include "bits/stdc++.h"
^~~~~~~~~~~~~~~
compilation terminated.
