結果
問題 | No.848 なかよし旅行 |
ユーザー | Haar |
提出日時 | 2019-07-07 20:38:28 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 99 ms / 2,000 ms |
コード長 | 3,647 bytes |
コンパイル時間 | 2,636 ms |
コンパイル使用メモリ | 216,032 KB |
実行使用メモリ | 10,756 KB |
最終ジャッジ日時 | 2024-11-08 00:59:30 |
合計ジャッジ時間 | 4,506 ms |
ジャッジサーバーID (参考情報) |
judge4 / 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 | 99 ms
10,756 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 | 3 ms
5,248 KB |
testcase_09 | AC | 3 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 18 ms
5,248 KB |
testcase_12 | AC | 24 ms
5,580 KB |
testcase_13 | AC | 30 ms
6,272 KB |
testcase_14 | AC | 12 ms
5,248 KB |
testcase_15 | AC | 28 ms
6,272 KB |
testcase_16 | AC | 47 ms
8,064 KB |
testcase_17 | AC | 33 ms
6,912 KB |
testcase_18 | AC | 18 ms
5,248 KB |
testcase_19 | AC | 16 ms
5,248 KB |
testcase_20 | AC | 9 ms
5,248 KB |
testcase_21 | AC | 38 ms
7,040 KB |
testcase_22 | AC | 37 ms
7,296 KB |
testcase_23 | AC | 20 ms
5,248 KB |
testcase_24 | AC | 2 ms
5,248 KB |
testcase_25 | AC | 51 ms
8,064 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
#include <bits/stdc++.h> #define LLI long long int #define FOR(v, a, b) for(LLI v = (a); v < (b); ++v) #define FORE(v, a, b) for(LLI v = (a); v <= (b); ++v) #define REP(v, n) FOR(v, 0, n) #define REPE(v, n) FORE(v, 0, n) #define REV(v, a, b) for(LLI v = (a); v >= (b); --v) #define ALL(x) (x).begin(), (x).end() #define RALL(x) (x).rbegin(), (x).rend() #define ITR(it, c) for(auto it = (c).begin(); it != (c).end(); ++it) #define RITR(it, c) for(auto it = (c).rbegin(); it != (c).rend(); ++it) #define EXIST(c,x) ((c).find(x) != (c).end()) #define fst first #define snd second #define popcount __builtin_popcount #define UNIQ(v) (v).erase(unique(ALL(v)), (v).end()) #define bit(i) (1LL<<(i)) #ifdef DEBUG #include <misc/C++/Debug.cpp> #else #define dump(...) ((void)0) #endif #define gcd __gcd using namespace std; template <class T> constexpr T lcm(T m, T n){return m/gcd(m,n)*n;} template <typename I> void join(ostream &ost, I s, I t, string d=" "){for(auto i=s; i!=t; ++i){if(i!=s)ost<<d; ost<<*i;}ost<<endl;} template <typename T> istream& operator>>(istream &is, vector<T> &v){for(auto &a : v) is >> a; return is;} template <typename T, typename U> istream& operator>>(istream &is, pair<T,U> &p){is >> p.first >> p.second; return is;} template <typename T, typename U> bool chmin(T &a, const U &b){return (a>b ? a=b, true : false);} template <typename T, typename U> bool chmax(T &a, const U &b){return (a<b ? a=b, true : false);} template <typename T, size_t N, typename U> void fill_array(T (&a)[N], const U &v){fill((U*)a, (U*)(a+N), v);} template <typename Cost = int> class Edge{ public: int from,to; Cost cost; Edge() {} Edge(int to, Cost cost): to(to), cost(cost){} Edge(int from, int to, Cost cost): from(from), to(to), cost(cost){} Edge rev() const {return Edge(to,from,cost);} friend ostream& operator<<(ostream &os, const Edge &e){ os << "(FROM: " << e.from << "," << "TO: " << e.to << "," << "COST: " << e.cost << ")"; return os; } }; template <typename T> using Graph = vector<vector<Edge<T>>>; template <typename T> vector<T> dijkstra(Graph<T> &graph, int src){ int n = graph.size(); vector<T> cost(n, -1); vector<bool> check(n, false); priority_queue<pair<T,int>, vector<pair<T,int>>, greater<pair<T,int>>> pq; cost[src] = 0; pq.push(make_pair(0,src)); while(!pq.empty()){ int i; T d; tie(d,i) = pq.top(); pq.pop(); if(check[i]) continue; check[i] = true; for(auto &e : graph[i]){ if(cost[e.to] < 0){ cost[e.to] = d + e.cost; pq.push(make_pair(cost[e.to], e.to)); }else{ if(cost[e.to] > d+e.cost){ cost[e.to] = min(cost[e.to], d + e.cost); if(!check[e.to]) pq.push(make_pair(cost[e.to], e.to)); } } } } return cost; } int main(){ cin.tie(0); ios::sync_with_stdio(false); int n,m,p,q,t; while(cin >> n >> m >> p >> q >> t){ --p, --q; Graph<LLI> graph(n); REP(i,m){ int a,b,c; cin >> a >> b >> c; --a, --b; graph[a].push_back(Edge<LLI>(a,b,c)); graph[b].push_back(Edge<LLI>(b,a,c)); } auto dist0 = dijkstra(graph,0); auto distp = dijkstra(graph,p); auto distq = dijkstra(graph,q); int ans = -1; // 二人でp,qを巡る { if(dist0[p]+distp[q]+dist0[q] <= t){ chmax(ans, t); } } // iで分岐,jで合流する REP(i,n){ REP(j,n){ if(dist0[i] + max(distp[i]+distp[j], distq[i]+distq[j]) + dist0[j] <= t){ chmax(ans, t-max(distp[i]+distp[j], distq[i]+distq[j])); } } } cout << ans << endl; } return 0; }