結果
問題 |
No.2387 Yokan Factory
|
ユーザー |
|
提出日時 | 2023-08-02 23:37:55 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 341 ms / 5,000 ms |
コード長 | 1,453 bytes |
コンパイル時間 | 2,136 ms |
コンパイル使用メモリ | 203,976 KB |
最終ジャッジ日時 | 2025-02-15 21:31:39 |
ジャッジサーバーID (参考情報) |
judge3 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 35 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:21:40: warning: format ‘%lld’ expects argument of type ‘long long int*’, but argument 4 has type ‘i64*’ {aka ‘long int*’} [-Wformat=] 21 | int n, m; i64 x; scanf("%d%d%lld", &n, &m, &x); | ~~~^ ~~ | | | | | i64* {aka long int*} | long long int* | %ld main.cpp:21:31: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 21 | int n, m; i64 x; scanf("%d%d%lld", &n, &m, &x); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:25:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 25 | scanf("%d%d%d%d", &u[i], &v[i], &a[i], &b[i]); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ソースコード
#include <bits/stdc++.h> using namespace std::literals::string_literals; using i64 = std::int_fast64_t; using std::cout; using std::cerr; using std::endl; using std::cin; #if defined(DONLINE_JUDGE) #define NDEBUG #elif defined(ONLINE_JUDGE) #define NDEBUG #endif template<typename T> std::vector<T> make_v(size_t a){return std::vector<T>(a);} template<typename T, typename... Ts> auto make_v(size_t a, Ts... ts){ return std::vector<decltype(make_v<T>(ts...))>(a, make_v<T>(ts...)); } int main() { int n, m; i64 x; scanf("%d%d%lld", &n, &m, &x); std::vector<int> u(m), v(m), a(m), b(m); std::vector<std::vector<int>> g(n); for (int i = 0; i < m; ++i) { scanf("%d%d%d%d", &u[i], &v[i], &a[i], &b[i]); g[--u[i]].push_back(i); g[--v[i]].push_back(i); } auto f = [&](int t) { using P = std::pair<i64, int>; std::priority_queue<P, std::vector<P>, std::greater<P>> qu; std::vector<i64> costs(n, 1LL << 60); qu.push({costs[0] = 0, 0}); while (!qu.empty()) { auto [cost, now] = qu.top(); qu.pop(); if (costs[now] != cost) continue; for (int idx: g[now]) { int to = u[idx] ^ v[idx] ^ now; i64 nx = cost + a[idx]; if (b[idx] < t) continue; if (costs[to] <= nx) continue; qu.push({costs[to] = nx, to}); } } return costs[n - 1] <= x; }; int ok = -1, ng = 1 << 30; while (ng - ok > 1){ int mid = (ok + ng) >> 1; if (f(mid)) ok = mid; else ng = mid; } printf("%d\n", ok); return 0; }