結果
| 問題 |
No.2805 Go to School
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-07-12 22:51:37 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 187 ms / 2,000 ms |
| コード長 | 1,726 bytes |
| コンパイル時間 | 1,669 ms |
| コンパイル使用メモリ | 173,216 KB |
| 実行使用メモリ | 24,368 KB |
| 最終ジャッジ日時 | 2025-04-09 15:40:23 |
| 合計ジャッジ時間 | 5,407 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 36 |
コンパイルメッセージ
main.cpp: In lambda function:
main.cpp:38:30: warning: structured bindings only available with ‘-std=c++17’ or ‘-std=gnu++17’ [-Wc++17-extensions]
38 | auto [d, u] = pq.top();
| ^
main.cpp:43:35: warning: structured bindings only available with ‘-std=c++17’ or ‘-std=gnu++17’ [-Wc++17-extensions]
43 | for (auto [v, weight] : g[u]) {
| ^
ソースコード
#include <bits/stdc++.h>
using namespace std;
#ifndef ONLINE_JUDGE
#include "algo/debug.h"
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif
#define int long long
const int INF = 1e15;
void solve() {
int n, m, l, s, e;
cin >> n >> m >> l >> s >> e;
vector<vector<pair<int, int>>> g(n);
for (int i = 0, a, b, w; i < m; i++) {
cin >> a >> b >> w; a--, b--;
g[a].push_back({b, w});
g[b].push_back({a, w});
}
vector<int> spec(l);
for (auto &x : spec) {
cin >> x;
x--;
}
e = s + e;
vector<vector<int>> min_dist(2, vector<int>(n, INF));
// Lambda function for Dijkstra's algorithm
auto dijkstra = [&](int start, int id) {
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> pq;
min_dist[id][start] = 0;
pq.push({0, start}); // {distance, node}
while (!pq.empty()) {
auto [d, u] = pq.top();
pq.pop();
if (d > min_dist[id][u]) continue; // Skip if we have already found a better path
for (auto [v, weight] : g[u]) {
if (min_dist[id][u] + weight < min_dist[id][v]) {
min_dist[id][v] = min_dist[id][u] + weight;
pq.push({min_dist[id][v], v});
}
}
}
};
dijkstra(0, 0);
dijkstra(n - 1, 1);
int ans = INF;
for (auto &x : spec) {
if (min_dist[0][x] < e) {
ans = min(ans, max(s, min_dist[0][x]) + 1 + min_dist[1][x]);
}
}
cout << (ans == INF ? -1 : ans) << '\n';
}
signed main() {
#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#else
#endif
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int t = 1;
//cin >> t;
while (t--) {
solve();
}
// cerr << "Time elapsed: " << ((long double)clock() / CLOCKS_PER_SEC) << " s.\n";
}