Submission #400755

#	Time	Username	Problem	Language	Result	Execution time	Memory
400755		BERNARB01	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	0 / 100	1 ms	204 KiB

skyscraper

#include <bits/stdc++.h>

using namespace std;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n, m;
	cin >> n >> m;
	vector<vector<pair<int, long long>>> g(n);
	for (int i = 0; i < n; i++) {
		int b, p;
		cin >> b >> p;
		for (int j = b + p, w = 1; j < n; j += p, w++) {
			g[b].emplace_back(j, w);
		}
		for (int j = b - p, w = 1; j >= 0; j -= p, w++) {
			g[b].emplace_back(j, w);
		}
	}
	priority_queue<pair<long long, int>, vector<pair<long long, int>>, greater<pair<long long, int>>> s;
	const long long inf = 8e18;
	vector<long long> dist(n, inf);
	dist[0] = 0;
	s.emplace(0, 0);
	while (!s.empty()) {
		auto [u, exp] = s.top();
		s.pop();
		if (exp != dist[u]) {
			continue;
		}
		for (auto [v, w] : g[u]) {
			if (dist[v] > dist[u] + w) {
				dist[v] = dist[u] + w;
				s.emplace(dist[v], v);
			}
		}
	}
	cout << (dist[1] == inf ? -1 : dist[1]) << '\n';
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43