Submission #526687

#	Time	Username	Problem	Language	Result	Execution time	Memory
526687		siewjh	Autobus (COCI22_autobus)	C++17	30 / 70	1042 ms	7444 KiB

Main

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
const int inf = 1'000'000'007;
int main() {
	int nodes, edges; cin >> nodes >> edges;
	vector<pair<pair<int, int>, int>> edgelist(edges);
	for (int i = 0; i < edges; i++) {
		int a, b, t; cin >> a >> b >> t;
		edgelist[i] = { {a, b},t };
	}
	int maxbus, queries; cin >> maxbus >> queries;
	maxbus = min(maxbus, nodes - 1);
	int dist[71][71][71];
	for (int i = 0; i < 71; i++)
		for (int j = 0; j < 71; j++)
			for (int k = 0; k < 71; k++)
				dist[i][j][k] = inf;
	for (int i = 1; i <= nodes; i++) {
		dist[i][i][0] = 0;
		for (int j = 1; j <= maxbus; j++)
			for (auto e : edgelist) {
				int a = e.first.first, b = e.first.second, t = e.second;
				dist[i][b][j] = min(dist[i][b][j], dist[i][a][j - 1] + t);
			}
	}
	for (int i = 0; i < queries; i++) {
		int a, b; cin >> a >> b;
		int ans = inf;
		for (int j = 0; j <= maxbus; j++) ans = min(ans, dist[a][b][j]);
		cout << ((ans == inf) ? -1 : ans) << '\n';
	}
	return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 0 / 25
• Subtask 4: 0 / 15