結果

問題 No.2805 Go to School
コンテスト
ユーザー ja14378
提出日時 2024-07-12 22:48:48
言語 C++17
(gcc 15.2.0 + boost 1.90.0)
コンパイル:
g++-15 -O2 -lm -std=c++17 -Wuninitialized -DONLINE_JUDGE -o a.out _filename_
実行:
./a.out
結果
AC  
実行時間 123 ms / 2,000 ms
コード長 1,678 bytes
記録
記録タグの例:
初AC ショートコード 純ショートコード 純主流ショートコード 最速実行時間
コンパイル時間 1,274 ms
コンパイル使用メモリ 224,040 KB
実行使用メモリ 17,800 KB
最終ジャッジ日時 2026-07-08 14:22:58
合計ジャッジ時間 5,230 ms
ジャッジサーバーID
(参考情報)
judge3_0 / judge2_0
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 4
other AC * 36
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function 'int main()':
main.cpp:16:37: warning: ignoring return value of 'std::basic_ostream<_CharT, _Traits>* std::basic_ios<_CharT, _Traits>::tie() const [with _CharT = char; _Traits = std::char_traits<char>]', declared with attribute 'nodiscard' [-Wunused-result]
   16 |     ios::sync_with_stdio(0); cin.tie();
      |                              ~~~~~~~^~
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/ios:48,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/istream:42,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/sstream:42,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/complex:50,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/x86_64-pc-linux-gnu/bits/stdc++.h:141,
                 from main.cpp:1:
/home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/bits/basic_ios.h:310:7: note: declared here
  310 |       tie() const
      |       ^~~

ソースコード

diff #
raw source code

#include <bits/stdc++.h>
//#include <atcoder/all>
using ll = long long;
#define MOD 1000000007
#define Mod 998244353
const int MAX = 1000000005;
const long long INF = 1000000000000000005LL;
using namespace std;
//using namespace atcoder;
#define MOD 1000000007

using i_i = pair<int, int>;
using ll_i = pair<ll, int>;

int main() {
    ios::sync_with_stdio(0); cin.tie();
    int N, M, L, S, E;
    cin >> N >> M >> L >> S >> E;
    vector<vector<i_i>> G(N);
    for (int i = 0; i < M; i++) {
        int a, b, t;
        cin >> a >> b >> t;
        a--; b--;
        G[a].push_back({b, t});
        G[b].push_back({a, t});
    }
    vector<int> T(L);
    for (int i = 0; i < L; i++) {cin >> T[i]; T[i]--;}
    priority_queue<ll_i, vector<ll_i>, greater<ll_i>> pq;
    vector<ll> dist(N, INF);
    pq.push({0, 0});
    dist[0] = 0;
    while (pq.size()) {
        auto [d, v] = pq.top();
        pq.pop();
        if (d != dist[v]) continue;
        for (auto [nv, c] : G[v]) {
            if (dist[nv] <= d + c) continue;
            dist[nv] = d + c;
            pq.push({d + c, nv});
        }
    }
    vector<ll> dist2(N, INF);
    dist2[N-1] = 0;
    pq.push({0, N-1});
    while (pq.size()) {
        auto [d, v] = pq.top();
        pq.pop();
        if (d != dist2[v]) continue;
        for (auto [nv, c] : G[v]) {
            if (dist2[nv] <= d + c) continue;
            dist2[nv] = d + c;
            pq.push({d + c, nv});
        }
    }
    
    ll ans = INF;
    for (int i = 0; i < L; i++) {
        ll d = dist[T[i]];
        if (d >= S + E) continue;
        ans = min(ans, max((ll)S, d) + 1 + dist2[T[i]]);
    }
    cout << (ans == INF ? -1 : ans) << endl;
}
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