Submission #741493

#	Time	Username	Problem	Language	Result	Execution time	Memory
741493		406	Travelling Merchant (APIO17_merchant)	C++17	0 / 100	89 ms	1996 KiB

merchant

#include "bits/stdc++.h"
#define int long long
using namespace std;
const long long INF = 1ll << 30;
const long long INF2 = 1ll << 60;
const int N = 100 + 5;
const int M = 1e4 + 5;
const int K = 1000 + 5;
int d[N][N], n, k, m, U[M], V[M], W[M], B[N][K], S[N][K], P[N][N], e;

void floyd(int d[N][N]) {
	for (int k = 0; k < n; k++) for (int i = 0; i < n; i++) for (int j = 0; j < n; j++) 
		d[i][j] = min(d[i][j], d[i][k] + d[k][j]);
}

signed main() {
	ios::sync_with_stdio(0), cin.tie(0);
	cin >> n >> e >> k;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < k; j++)
			cin >> B[i][j];
		for (int j = 0; j < k; j++) 
			cin >> S[i][j];
	}
	for (int i = 0; i < e; i++) {
		cin >> U[i] >> V[i] >> W[i];	
		V[i]--, U[i]--;
	}
	
	for (int i = 0; i < n; i++) for (int j = 0; j < n; j++) for (int l = 0; l < k; l++) if (B[i][l] != -1 && S[j][l] != -1)
		P[i][j] = max(P[i][j], -B[i][l] +S[j][l]);

	int l = 0, r = INF;
	while (r - l > 1) {
		int m = l + r >> 1;
		for (int i = 0; i < n; i++) for (int j = 0; j < n; j++) d[i][j] = INF2;
		for (int i = 0; i < e; i++) 
			d[U[i]][V[i]] = W[i] * m;
		floyd(d);
		
		for (int i = 0; i < n; i++) for (int j = 0; j < n; j++)
			d[i][j] -= P[i][j];
		floyd(d);
		bool ok = 0;
		for (int i = 0; i < n; i++) ok |= d[i][i] <= 0;

		if (ok) l = m;
		else r = m;
	}
	cout << l << '\n';
	return 0;
}
//الان میتونی بری

Compilation message (stderr)

merchant.cpp: In function 'int main()':
merchant.cpp:35:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   35 |   int m = l + r >> 1;
      |           ~~^~~

• Subtask 1: 0 / 12
• Subtask 2: 0 / 21
• Subtask 3: 0 / 33
• Subtask 4: 0 / 34