結果
問題 | No.848 なかよし旅行 |
ユーザー | kcvlex |
提出日時 | 2019-07-05 22:03:06 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 94 ms / 2,000 ms |
コード長 | 3,147 bytes |
コンパイル時間 | 1,892 ms |
コンパイル使用メモリ | 179,112 KB |
実行使用メモリ | 10,496 KB |
最終ジャッジ日時 | 2024-11-08 00:48:42 |
合計ジャッジ時間 | 3,658 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 94 ms
10,496 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 3 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 20 ms
5,248 KB |
testcase_12 | AC | 25 ms
5,460 KB |
testcase_13 | AC | 32 ms
6,272 KB |
testcase_14 | AC | 14 ms
5,248 KB |
testcase_15 | AC | 30 ms
6,144 KB |
testcase_16 | AC | 48 ms
8,064 KB |
testcase_17 | AC | 33 ms
7,040 KB |
testcase_18 | AC | 19 ms
5,248 KB |
testcase_19 | AC | 18 ms
5,248 KB |
testcase_20 | AC | 11 ms
5,248 KB |
testcase_21 | AC | 39 ms
7,168 KB |
testcase_22 | AC | 37 ms
7,424 KB |
testcase_23 | AC | 10 ms
5,248 KB |
testcase_24 | AC | 2 ms
5,248 KB |
testcase_25 | AC | 50 ms
7,936 KB |
testcase_26 | AC | 2 ms
5,248 KB |
testcase_27 | AC | 2 ms
5,248 KB |
testcase_28 | AC | 2 ms
5,248 KB |
testcase_29 | AC | 2 ms
5,248 KB |
ソースコード
// #define DEBUGGING #include <bits/stdc++.h> using namespace std; #define endl '\n' #define ALL(V) (V).begin(), (V).end() #define ALLR(V) (V).rbegin(), (V).rend() template <typename T> using V = vector<T>; template <typename T> using VV = V<V<T>>; using ll = int64_t; using ull = uint64_t; using PLL = pair<ll, ll>; template <typename T> const T& var_min(const T &t) { return t; } template <typename T> const T& var_max(const T &t) { return t; } template <typename T, typename... Tail> const T& var_min(const T &t, const Tail&... tail) { return min(t, var_min(tail...)); } template <typename T, typename... Tail> const T& var_max(const T &t, const Tail&... tail) { return max(t, var_max(tail...)); } template <typename T, typename... Tail> void chmin(T &t, const Tail&... tail) { t = var_min(t, tail...); } template <typename T, typename... Tail> void chmax(T &t, const Tail&... tail) { t = var_max(t, tail...); } template <typename T> const T& clamp(const T &t, const T &low, const T &high) { return max(low, min(high, t)); } template <typename T> void chclamp(T &t, const T &low, const T &high) { t = clamp(t, low, high); } namespace init__ { struct InitIO { InitIO() { cin.tie(nullptr); ios_base::sync_with_stdio(false); cout << fixed << setprecision(30); } } init_io; } #ifdef DEBUGGING #include "../debug.cpp" #else #define DEBUG(...) 0 #define DEBUG_SEPARATOR_LINE 0 #endif template <typename T> T make_v(T init) { return init; } template <typename T, typename... Tail> auto make_v(T init, size_t s, Tail... tail) { #define rec make_v(init, tail...) return V<decltype(rec)>(s, rec); #undef rec } VV<PLL> edges; const ll inf = 5e15; ll N, M, P, Q, T; using PQ = priority_queue<PLL, V<PLL>, greater<PLL>>; V<ll> dijk(ll start) { V<ll> dists(N, inf); dists[start] = 0; PQ pq; pq.emplace(0, start); while(pq.size()) { ll dist, now; tie(dist, now) = pq.top(); pq.pop(); if(dists[now] < dist) continue; for(const auto &edge : edges[now]) { ll nxt, cost; tie(nxt, cost) = edge; if(dists[nxt] <= dist + cost) continue; dists[nxt] = dist + cost; pq.emplace(dist + cost, nxt); } } return dists; } int main() { cin >> N >> M >> P >> Q >> T; P--; Q--; edges.resize(N); for(ll i = 0; i < M; i++) { ll a, b, c; cin >> a >> b >> c; a--; b--; edges[a].emplace_back(b, c); edges[b].emplace_back(a, c); } auto dists_start = dijk(0); auto dists_p = dijk(P); auto dists_q = dijk(Q); if(dists_start[P] + dists_p[Q] + dists_q[0] <= T) { cout << T << endl; return 0; } ll ans = -1; for(ll i = 0; i < N; i++) for(ll j = 0; j < N; j++) { ll same_first = dists_start[i]; ll pass_p = dists_p[i] + dists_p[j]; ll pass_q = dists_q[i] + dists_q[j]; ll same_last = dists_start[j]; ll sum = same_first + max(pass_p, pass_q) + same_last; if(sum <= T) chmax(ans, T - max(pass_p, pass_q)); } cout << ans << endl; return 0; }