結果
問題 | No.2764 Warp Drive Spacecraft |
ユーザー | 沙耶花 |
提出日時 | 2024-05-17 22:29:22 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 508 ms / 3,000 ms |
コード長 | 2,547 bytes |
コンパイル時間 | 4,655 ms |
コンパイル使用メモリ | 276,856 KB |
実行使用メモリ | 26,156 KB |
最終ジャッジ日時 | 2024-07-17 20:23:48 |
合計ジャッジ時間 | 14,423 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
(要ログイン)
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 | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 1 ms
6,944 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 1 ms
6,944 KB |
testcase_07 | AC | 1 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | AC | 1 ms
6,944 KB |
testcase_10 | AC | 3 ms
6,944 KB |
testcase_11 | AC | 2 ms
6,944 KB |
testcase_12 | AC | 3 ms
6,944 KB |
testcase_13 | AC | 3 ms
6,944 KB |
testcase_14 | AC | 2 ms
6,944 KB |
testcase_15 | AC | 2 ms
6,944 KB |
testcase_16 | AC | 262 ms
21,912 KB |
testcase_17 | AC | 256 ms
22,104 KB |
testcase_18 | AC | 253 ms
22,160 KB |
testcase_19 | AC | 378 ms
20,168 KB |
testcase_20 | AC | 390 ms
21,444 KB |
testcase_21 | AC | 392 ms
20,384 KB |
testcase_22 | AC | 391 ms
21,372 KB |
testcase_23 | AC | 386 ms
20,064 KB |
testcase_24 | AC | 386 ms
21,324 KB |
testcase_25 | AC | 394 ms
21,528 KB |
testcase_26 | AC | 498 ms
25,332 KB |
testcase_27 | AC | 482 ms
25,080 KB |
testcase_28 | AC | 476 ms
25,620 KB |
testcase_29 | AC | 489 ms
25,684 KB |
testcase_30 | AC | 481 ms
25,064 KB |
testcase_31 | AC | 508 ms
26,044 KB |
testcase_32 | AC | 499 ms
26,156 KB |
testcase_33 | AC | 235 ms
15,444 KB |
testcase_34 | AC | 236 ms
15,324 KB |
testcase_35 | AC | 238 ms
15,476 KB |
testcase_36 | AC | 241 ms
22,152 KB |
testcase_37 | AC | 243 ms
19,488 KB |
testcase_38 | AC | 208 ms
17,536 KB |
ソースコード
#include <stdio.h> #include <bits/stdc++.h> #include <atcoder/all> using namespace atcoder; using mint = modint998244353; using namespace std; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf32 1000000001 #define Inf64 1000000000000000001 /** * Author: Simon Lindholm * Date: 2017-04-20 * License: CC0 * Source: own work * Description: Container where you can add lines of the form kx+m, and query maximum values at points x. * Useful for dynamic programming (``convex hull trick''). * Time: O(\log N) * Status: stress-tested */ using ll =long long; struct Line { mutable ll k, m, p; bool operator<(const Line& o) const { return k < o.k; } bool operator<(ll x) const { return p < x; } }; struct LineContainer : multiset<Line, less<>> { // (for doubles, use inf = 1/.0, div(a,b) = a/b) static const ll inf = LLONG_MAX - 1000000000LL; ll div(ll a, ll b) { // floored division return a / b - ((a ^ b) < 0 && a % b); } bool isect(iterator x, iterator y) { if (y == end()) return x->p = inf, 0; if (x->k == y->k) x->p = x->m > y->m ? inf : -inf; else x->p = div(y->m - x->m, x->k - y->k); return x->p >= y->p; } void add(ll k, ll m) { auto z = insert({k, m, 0}), y = z++, x = y; while (isect(y, z)) z = erase(z); if (x != begin() && isect(--x, y)) isect(x, y = erase(y)); while ((y = x) != begin() && (--x)->p >= y->p) isect(x, erase(y)); } ll query(ll x) { assert(!empty()); auto l = *lower_bound(x); return l.k * x + l.m; } }; vector<long long> get_distance(vector<vector<pair<int,long long>>> &E,int s){ int N = E.size(); vector<long long> dist(N,Inf64); dist[s] = 0; priority_queue<pair<long long,int>,vector<pair<long long,int>>,greater<pair<long long,int>>> pq; pq.push({0,s}); while(!pq.empty()){ auto [d,u] = pq.top(); pq.pop(); if(dist[u] !=d )continue; for(auto [v,w]:E[u]){ if(dist[v] > dist[u] + w){ dist[v] = dist[u] + w; pq.push({dist[v],v}); } } } return dist; } int main(){ int N,M; cin>>N>>M; vector<long long> w(N); rep(i,N)cin>>w[i]; vector<vector<pair<int,long long>>> E(N); rep(i,M){ int u,v; long long ww; cin>>u>>v>>ww; u--,v--; E[u].emplace_back(v,ww); E[v].emplace_back(u,ww); //E[v].push_back({u,ww}); } auto x = get_distance(E,0),y = get_distance(E,N-1); long long ans = x[N-1]; LineContainer cht; rep(i,N){ if(x[i]==Inf64)continue; cht.add(-w[i],-x[i]); } if(!cht.empty()){ rep(i,N){ if(y[i]==Inf64)continue; ans = min(ans,-cht.query(w[i]) + y[i]); } } cout<<ans<<endl; return 0; }