結果
問題 | No.848 なかよし旅行 |
ユーザー | Sumitacchan |
提出日時 | 2019-07-05 22:20:58 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 3,346 bytes |
コンパイル時間 | 1,814 ms |
コンパイル使用メモリ | 177,912 KB |
実行使用メモリ | 48,768 KB |
最終ジャッジ日時 | 2024-10-06 22:12:03 |
合計ジャッジ時間 | 8,540 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
(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 | TLE | - |
testcase_01 | -- | - |
testcase_02 | -- | - |
testcase_03 | -- | - |
testcase_04 | -- | - |
testcase_05 | -- | - |
testcase_06 | -- | - |
testcase_07 | -- | - |
testcase_08 | -- | - |
testcase_09 | -- | - |
testcase_10 | -- | - |
testcase_11 | -- | - |
testcase_12 | -- | - |
testcase_13 | -- | - |
testcase_14 | -- | - |
testcase_15 | -- | - |
testcase_16 | -- | - |
testcase_17 | -- | - |
testcase_18 | -- | - |
testcase_19 | -- | - |
testcase_20 | -- | - |
testcase_21 | -- | - |
testcase_22 | -- | - |
testcase_23 | -- | - |
testcase_24 | -- | - |
testcase_25 | -- | - |
testcase_26 | -- | - |
testcase_27 | -- | - |
testcase_28 | -- | - |
testcase_29 | -- | - |
ソースコード
#include <bits/stdc++.h> using namespace std; struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; #define FOR(i, begin, end) for(int i=(begin);i<(end);i++) #define REP(i, n) FOR(i,0,n) #define IFOR(i, begin, end) for(int i=(end)-1;i>=(begin);i--) #define IREP(i, n) IFOR(i,0,n) #define Sort(v) sort(v.begin(), v.end()) #define Reverse(v) reverse(v.begin(), v.end()) #define all(v) v.begin(),v.end() #define SZ(v) ((int)v.size()) #define Lower_bound(v, x) distance(v.begin(), lower_bound(v.begin(), v.end(), x)) #define Upper_bound(v, x) distance(v.begin(), upper_bound(v.begin(), v.end(), x)) #define Max(a, b) a = max(a, b) #define Min(a, b) a = min(a, b) #define bit(n) (1LL<<(n)) #define bit_exist(x, n) ((x >> n) & 1) #define debug(x) cout << #x << "=" << x << endl; #define vdebug(v) cout << #v << "=" << endl; REP(i_debug, v.size()){ cout << v[i_debug] << ","; } cout << endl; #define mdebug(m) cout << #m << "=" << endl; REP(i_debug, m.size()){ REP(j_debug, m[i_debug].size()){ cout << m[i_debug][j_debug] << ","; } cout << endl;} #define pb push_back #define f first #define s second #define int long long #define INF 1000000000000000000 template<typename T> istream &operator>>(istream &is, vector<T> &v){ for (auto &x : v) is >> x; return is; } template<typename T> ostream &operator<<(ostream &os, vector<T> &v){ for(int i = 0; i < v.size(); i++) { cout << v[i]; if(i != v.size() - 1) cout << endl; }; return os; } template<typename T> void Out(T x) { cout << x << endl; } template<typename T1, typename T2> void Ans(bool f, T1 y, T2 n) { if(f) Out(y); else Out(n); } using vec = vector<int>; using mat = vector<vec>; using Pii = pair<int, int>; using PiP = pair<int, Pii>; using PPi = pair<Pii, int>; using bools = vector<bool>; using pairs = vector<Pii>; //int dx[4] = {1,0,-1,0}; //int dy[4] = {0,1,0,-1}; //char d[4] = {'D','R','U','L'}; const int mod = 1000000007; //const int mod = 998244353; #define Add(x, y) x = (x + (y)) % mod #define Mult(x, y) x = (x * (y)) % mod struct edge{int to, cost;}; class Graph { public: int N; vector<vector<edge>> G; Graph(int N): N(N){ G = vector<vector<edge>>(N, vector<edge>(0)); } void add_Directed_edge(int from, int to, int cost = 1){ G[from].push_back(edge({to, cost})); } void add_Undirected_edge(int v1, int v2, int cost = 1){ add_Directed_edge(v1, v2, cost); add_Directed_edge(v2, v1, cost); } mat waeshall_floyd(){ mat d(N, vec(N)); REP(i, N) REP(j, N){ if(i == j) d[i][j] = 0; else d[i][j] = INF; } REP(v, N) REP(i, G[v].size()){ edge e = G[v][i]; d[v][e.to] = e.cost; } REP(k, N) REP(i, N) REP(j, N) d[i][j] = min(d[i][j], d[i][k] + d[k][j]); return d; } }; signed main(){ int N, M, P, Q, T; cin >> N >> M >> P >> Q >> T; P--; Q--; Graph G(N); int a, b, c; REP(i, M){ cin >> a >> b >> c; G.add_Undirected_edge(a - 1, b - 1, c); } mat d = G.waeshall_floyd(); int ans = -1; REP(i, N){ if(2 * (d[0][i] + max(d[i][P], d[i][Q])) <= T) Max(ans, T - 2 * max(d[i][P], d[i][Q])); } if(d[0][P] + d[P][Q] + d[Q][0] <= T) ans = T; Out(ans); return 0; }