結果
問題 | No.2805 Go to School |
ユーザー |
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提出日時 | 2024-07-15 15:08:49 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 270 ms / 2,000 ms |
コード長 | 1,451 bytes |
コンパイル時間 | 746 ms |
コンパイル使用メモリ | 63,668 KB |
最終ジャッジ日時 | 2025-02-23 15:46:39 |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 35 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:60:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 60 | scanf("%d%d%d%d%d", &n, &m, &l, &s, &e); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:64:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 64 | scanf("%d%d%d", &u, &v, &t); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:70:36: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 70 | for (int i = 0; i < l; i++) scanf("%d", ts + i), ts[i]--; | ~~~~~^~~~~~~~~~~~~~
ソースコード
/* -*- coding: utf-8 -*-** 2805.cc: No.2805 Go to School - yukicoder*/#include<cstdio>#include<vector>#include<queue>#include<algorithm>#include<utility>using namespace std;/* constant */const int MAX_N = 200000;const long long LINF = 1LL << 62;/* typedef */using ll = long long;using pii = pair<int,int>;using pli = pair<ll,int>;using vpii = vector<pii>;/* global variables */vpii nbrs[MAX_N];int ts[MAX_N];ll ds0[MAX_N], ds1[MAX_N];/* subroutines */void dijkstra(int n, int st, ll ds[]) {fill(ds, ds + n, LINF);ds[st] = 0;priority_queue<pli> q;q.push({0, st});while (! q.empty()) {auto [ud, u] = q.top(); q.pop();ud = -ud;if (ds[u] != ud) continue;for (auto [v, t]: nbrs[u]) {ll vd = ud + t;if (ds[v] > vd) {ds[v] = vd;q.push({-vd, v});}}}}/* main */int main() {int n, m, l, s, e;scanf("%d%d%d%d%d", &n, &m, &l, &s, &e);for (int i = 0; i < m; i++) {int u, v, t;scanf("%d%d%d", &u, &v, &t);u--, v--;nbrs[u].push_back({v, t});nbrs[v].push_back({u, t});}for (int i = 0; i < l; i++) scanf("%d", ts + i), ts[i]--;dijkstra(n, 0, ds0);dijkstra(n, n - 1, ds1);ll mind = LINF;for (int i = 0; i < l; i++)if (ds0[ts[i]] < s + e) {ll d = max(ds0[ts[i]] , (ll)s) + 1 + ds1[ts[i]];mind = min(mind, d);}printf("%lld\n", (mind < LINF) ? mind : -1LL);return 0;}