結果

問題 No.2387 Yokan Factory
ユーザー Forested
提出日時 2023-07-21 21:35:12
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 1,038 ms / 5,000 ms
コード長 3,214 bytes
コンパイル時間 1,913 ms
コンパイル使用メモリ 135,796 KB
最終ジャッジ日時 2025-02-15 16:28:23
ジャッジサーバーID
(参考情報)
judge5 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 35
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#ifndef LOCAL
#define FAST_IO
#endif
// ============
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <cmath>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#define OVERRIDE(a, b, c, d, ...) d
#define REP2(i, n) for (i32 i = 0; i < (i32)(n); ++i)
#define REP3(i, m, n) for (i32 i = (i32)(m); i < (i32)(n); ++i)
#define REP(...) OVERRIDE(__VA_ARGS__, REP3, REP2)(__VA_ARGS__)
#define PER(i, n) for (i32 i = (i32)(n) - 1; i >= 0; --i)
#define ALL(x) begin(x), end(x)
using namespace std;
using u32 = unsigned int;
using u64 = unsigned long long;
using i32 = signed int;
using i64 = signed long long;
using f64 = double;
using f80 = long double;
template <typename T>
using Vec = vector<T>;
template <typename T>
bool chmin(T &x, const T &y) {
if (x > y) {
x = y;
return true;
}
return false;
}
template <typename T>
bool chmax(T &x, const T &y) {
if (x < y) {
x = y;
return true;
}
return false;
}
#ifdef INT128
using u128 = __uint128_t;
using i128 = __int128_t;
istream &operator>>(istream &is, i128 &x) {
i64 v;
is >> v;
x = v;
return is;
}
ostream &operator<<(ostream &os, i128 x) {
os << (i64)x;
return os;
}
istream &operator>>(istream &is, u128 &x) {
u64 v;
is >> v;
x = v;
return is;
}
ostream &operator<<(ostream &os, u128 x) {
os << (u64)x;
return os;
}
#endif
[[maybe_unused]] constexpr i32 INF = 1000000100;
[[maybe_unused]] constexpr i64 INF64 = 3000000000000000100;
struct SetUpIO {
SetUpIO() {
#ifdef FAST_IO
ios::sync_with_stdio(false);
cin.tie(nullptr);
#endif
cout << fixed << setprecision(15);
}
} set_up_io;
// ============
#ifdef DEBUGF
#else
#define DBG(x) (void)0
#endif
int main() {
i32 n, m;
i64 x;
cin >> n >> m >> x;
Vec<i32> u(m), v(m), a(m), b(m);
REP(i, m) {
cin >> u[i] >> v[i] >> a[i] >> b[i];
--u[i];
--v[i];
}
const auto is_ok = [&](i32 t) -> bool {
Vec<Vec<pair<i32, i32>>> g(n);
REP(i, m) {
if (b[i] >= t) {
g[u[i]].emplace_back(v[i], a[i]);
g[v[i]].emplace_back(u[i], a[i]);
}
}
Vec<i64> dist(n, INF64);
priority_queue<pair<i64, i32>> pq;
dist[0] = 0;
pq.emplace(0, 0);
while (!pq.empty()) {
auto [d, v] = pq.top();
pq.pop();
d *= -1;
if (d > dist[v]) {
continue;
}
for (const auto [u, l] : g[v]) {
if (chmin(dist[u], d + l)) {
pq.emplace(-dist[u], u);
}
}
}
DBG(dist);
return dist[n - 1] <= x;
};
i32 ok = -1, ng = INF;
while (ng - ok > 1) {
i32 mid = (ok + ng) / 2;
if (is_ok(mid)) {
ok = mid;
} else {
ng = mid;
}
}
cout << ok << '\n';
}
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