結果
問題 | No.2764 Warp Drive Spacecraft |
ユーザー | 👑 binap |
提出日時 | 2024-04-29 01:49:20 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 570 ms / 3,000 ms |
コード長 | 4,203 bytes |
コンパイル時間 | 2,687 ms |
コンパイル使用メモリ | 242,600 KB |
実行使用メモリ | 33,460 KB |
最終ジャッジ日時 | 2024-07-17 20:22:39 |
合計ジャッジ時間 | 14,468 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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 | 1 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,944 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,944 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,944 KB |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | AC | 1 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 3 ms
6,940 KB |
testcase_13 | AC | 3 ms
6,940 KB |
testcase_14 | AC | 2 ms
6,940 KB |
testcase_15 | AC | 2 ms
6,944 KB |
testcase_16 | AC | 273 ms
31,692 KB |
testcase_17 | AC | 276 ms
32,312 KB |
testcase_18 | AC | 270 ms
30,932 KB |
testcase_19 | AC | 417 ms
25,108 KB |
testcase_20 | AC | 431 ms
24,912 KB |
testcase_21 | AC | 476 ms
24,196 KB |
testcase_22 | AC | 432 ms
24,436 KB |
testcase_23 | AC | 430 ms
24,656 KB |
testcase_24 | AC | 451 ms
24,864 KB |
testcase_25 | AC | 432 ms
25,856 KB |
testcase_26 | AC | 555 ms
32,396 KB |
testcase_27 | AC | 551 ms
33,152 KB |
testcase_28 | AC | 548 ms
32,596 KB |
testcase_29 | AC | 561 ms
32,892 KB |
testcase_30 | AC | 539 ms
31,664 KB |
testcase_31 | AC | 570 ms
33,148 KB |
testcase_32 | AC | 565 ms
33,460 KB |
testcase_33 | AC | 324 ms
21,920 KB |
testcase_34 | AC | 324 ms
20,620 KB |
testcase_35 | AC | 335 ms
21,984 KB |
testcase_36 | AC | 259 ms
30,836 KB |
testcase_37 | AC | 265 ms
28,116 KB |
testcase_38 | AC | 240 ms
22,160 KB |
ソースコード
#include<bits/stdc++.h> using namespace std; template<typename T> void chmin(T& a, T b){a = min(a, b);} // thanks for Luzhiled-san's website // https://ei1333.github.io/luzhiled/snippets/structure/convex-hull-trick-add-monotone.html template< typename T, bool isMin > struct ConvexHullTrickAddMonotone { #define F first #define S second using P = pair< T, T >; deque< P > H; ConvexHullTrickAddMonotone() = default; bool empty() const { return H.empty(); } void clear() { H.clear(); } inline int sgn(T x) { return x == 0 ? 0 : (x < 0 ? -1 : 1); } using D = long double; inline bool check(const P &a, const P &b, const P &c) { if(b.S == a.S || c.S == b.S) return sgn(b.F - a.F) * sgn(c.S - b.S) >= sgn(c.F - b.F) * sgn(b.S - a.S); //return (b.F-a.F)*(c.S-b.S) >= (b.S-a.S)*(c.F-b.F); return D(b.F - a.F) * sgn(c.S - b.S) / D(abs(b.S - a.S)) >= D(c.F - b.F) * sgn(b.S - a.S) / D(abs(c.S - b.S)); } void add(T a, T b) { if(!isMin) a *= -1, b *= -1; P line(a, b); if(empty()) { H.emplace_front(line); return; } if(H.front().F <= a) { if(H.front().F == a) { if(H.front().S <= b) return; H.pop_front(); } while(H.size() >= 2 && check(line, H.front(), H[1])) H.pop_front(); H.emplace_front(line); } else { assert(a <= H.back().F); if(H.back().F == a) { if(H.back().S <= b) return; H.pop_back(); } while(H.size() >= 2 && check(H[H.size() - 2], H.back(), line)) H.pop_back(); H.emplace_back(line); } } inline T get_y(const P &a, const T &x) { return a.F * x + a.S; } T query_monotone_inc(T x) { assert(!empty()); while(H.size() >= 2 && get_y(H.front(), x) >= get_y(H[1], x)) H.pop_front(); if(isMin) return get_y(H.front(), x); return -get_y(H.front(), x); } #undef F #undef S }; const long long INF = 2002002002002002002; using S = long long; S _INF(INF); S _ZERO(0LL); using F = long long; S apply(F f, S x){ return f + x; } template<typename S, typename F> struct Dijkstra{ struct Edge{ int from, to; F cost; Edge(int from, int to, F cost) : from(from), to(to), cost(cost) {}; }; int n, m; vector<bool> initialized; vector<Edge> E; vector<vector<int>> G; map<int, vector<S>> dist; map<int, vector<int>> idx; Dijkstra(int _n) : n(_n), m(0), initialized(n, false), G(n){} void add_edge(int from, int to, F cost){ Edge e(from, to, cost); E.push_back(e); G[from].emplace_back(m); m++; } void calc(int s){ initialized[s] = true; dist[s] = vector<S>(n, _INF); idx[s] = vector<int>(n, -1); priority_queue<tuple<S, int, int>, vector<tuple<S, int, int>>, greater<tuple<S, int, int>>> pq; pq.emplace(_ZERO, s, -1); while(pq.size()){ auto [dist_from, from, index] = pq.top(); pq.pop(); if(dist[s][from] <= dist_from) continue; dist[s][from] = dist_from; idx[s][from] = index; for(int index : G[from]){ int to = E[index].to; S dist_to = apply(E[index].cost, dist_from); if(dist[s][to] <= dist_to) continue; pq.emplace(dist_to, to, index); } } } S get_dist(int s, int t){ if(!initialized[s]) calc(s); return dist[s][t]; } }; int main(){ int n, m; cin >> n >> m; vector<long long> w(n); for(int i = 0; i < n; i++) cin >> w[i]; Dijkstra<long long, long long> graph(n); for(int i = 0; i < m; i++){ int u, v; long long t; cin >> u >> v >> t; u--; v--; graph.add_edge(u, v, t); graph.add_edge(v, u, t); } vector<long long> dist_s(n); vector<long long> dist_t(n); for(int i = 0; i < n; i++) dist_s[i] = graph.get_dist(0, i); for(int i = 0; i < n; i++) dist_t[i] = graph.get_dist(n - 1, i); long long ans = dist_s[n - 1]; ConvexHullTrickAddMonotone<long long, true> CHT; vector<int> asc(n); for(int i = 0; i < n; i++) asc[i] = i; sort(asc.begin(), asc.end(), [&](int left, int right){ return w[left] < w[right]; }); for(int i = 0; i < n; i++){ int idx = asc[i]; if(dist_t[idx] < INF) CHT.add(w[idx], dist_t[idx]); } for(int i = 0; i < n; i++){ int idx = asc[i]; if(dist_s[idx] < INF) chmin(ans, dist_s[idx] + CHT.query_monotone_inc(w[idx])); } cout << ans << "\n"; return 0; }