結果
問題 | No.848 なかよし旅行 |
ユーザー | yuji9511 |
提出日時 | 2019-07-05 23:48:24 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 723 ms / 2,000 ms |
コード長 | 2,620 bytes |
コンパイル時間 | 1,509 ms |
コンパイル使用メモリ | 167,284 KB |
実行使用メモリ | 11,596 KB |
最終ジャッジ日時 | 2024-11-08 00:55:41 |
合計ジャッジ時間 | 4,558 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 | 723 ms
11,596 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 | 3 ms
5,248 KB |
testcase_11 | AC | 27 ms
6,016 KB |
testcase_12 | AC | 34 ms
6,656 KB |
testcase_13 | AC | 44 ms
7,680 KB |
testcase_14 | AC | 17 ms
5,248 KB |
testcase_15 | AC | 40 ms
7,680 KB |
testcase_16 | AC | 65 ms
10,368 KB |
testcase_17 | AC | 39 ms
8,448 KB |
testcase_18 | AC | 25 ms
5,760 KB |
testcase_19 | AC | 24 ms
5,248 KB |
testcase_20 | AC | 19 ms
5,248 KB |
testcase_21 | AC | 48 ms
8,960 KB |
testcase_22 | AC | 43 ms
9,600 KB |
testcase_23 | AC | 25 ms
5,248 KB |
testcase_24 | AC | 2 ms
5,248 KB |
testcase_25 | AC | 62 ms
10,240 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> using namespace std; typedef long long ll; typedef pair<ll, ll> lpair; const ll MOD = 1e9 + 7; const ll INF = 1e18; #define rep(i,m,n) for(ll i = (m); i < (n); i++) #define rrep(i,m,n) for(ll i = (m); i >= (n); i--) #define print(x) cout << (x) << endl; #define print2(x,y) cout << (x) << " " << (y) << endl; #define printa(x,n) for(ll i = 0; i < n; i++){ cout << (x[i]) << " ";} cout<<endl; ll a[100010], b[100010], c[100010]; vector<lpair> tree[2010]; int main(){ cin.tie(0); ios::sync_with_stdio(false); ll N,M,P,Q,T; cin >> N >> M >> P >> Q >> T; P--; Q--; rep(i,0,M){ cin >> a[i] >> b[i] >> c[i]; a[i]--; b[i]--; tree[a[i]].push_back(make_pair(b[i], c[i])); tree[b[i]].push_back(make_pair(a[i], c[i])); } priority_queue<lpair, vector<lpair> ,greater<lpair> > pq; ll dist[2010] = {}; rep(i,1,N) dist[i] = INF; rep(i,0,N) pq.push(make_pair(dist[i], i)); while(!pq.empty()){ lpair l1 = pq.top(); pq.pop(); for(auto &e: tree[l1.second]){ if(dist[e.first] > dist[l1.second] + e.second){ dist[e.first] = dist[l1.second] + e.second; pq.push(make_pair(dist[e.first], e.first)); } } } ll distP[2010] = {}; rep(i,0,N) distP[i] = INF; distP[P] = 0; rep(i,0,N) pq.push(make_pair(dist[i], i)); while(!pq.empty()){ lpair l1 = pq.top(); pq.pop(); for(auto &e: tree[l1.second]){ if(distP[e.first] > distP[l1.second] + e.second){ distP[e.first] = distP[l1.second] + e.second; pq.push(make_pair(distP[e.first], e.first)); } } } ll distQ[2010] = {}; rep(i,0,N) distQ[i] = INF; distQ[Q] = 0; rep(i,0,N) pq.push(make_pair(dist[i], i)); while(!pq.empty()){ lpair l1 = pq.top(); pq.pop(); for(auto &e: tree[l1.second]){ if(distQ[e.first] > distQ[l1.second] + e.second){ distQ[e.first] = distQ[l1.second] + e.second; pq.push(make_pair(distQ[e.first], e.first)); } } } ll ans = -INF; rep(i,0,N){ rep(j,0,N){ ll dd = dist[i] + max(distP[i] + distP[j], distQ[i] + distQ[j]) + dist[j]; if(dd <= T){ ans = max(ans, T - max(distP[i] + distP[j], distQ[i] + distQ[j])); } } } if(dist[P] + distP[Q] + dist[Q] <= T){ print(T); return 0; } if(ans == -INF){ print(-1); }else{ print(ans); } }