Submission #649701

#	Time	Username	Problem	Language	Result	Execution time	Memory
649701		birthdaycake	Commuter Pass (JOI18_commuter_pass)	C++17	24 / 100	91 ms	20820 KiB

commuter_pass

//
//  main.cpp
//  a.cpp
//
//  Created by Juri Aljohani on 03/02/1444 AH.
//

//
//  main.cpp
//  a.cpp
//
//  Created by Juri Aljohani on 03/02/1444 AH.
//
 
#ifndef _GLIBCXX_NO_ASSERT
#include <cassert>
#endif
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
 
#if __cplusplus >= 201103L
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#endif
 
// C++
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
 
#if __cplusplus >= 201103L
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#endif




// - - - - - -


// #include<bits/stdc++.h>
using namespace std;
#define int long long

vector<pair<int,int>>adj[200001];
int ans = 1e18;
int dij[5][100001];
int best[100001];
int bll[301][301];
signed main(){
    int n,m; cin >> n >> m;
    int s,t; cin >> s >> t;
    int u,v; cin >> u >> v;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            bll[i][j] = bll[j][i] = 1e18;
            if(i == j) bll[i][j] = bll[j][i] = 0;
        }
    }
    for(int i = 0; i < m; i++){
        int a,b,c; cin >> a >> b >> c;
        adj[a].push_back({b,c});
        adj[b].push_back({a,c});
        bll[a][b] = min(bll[a][b], c);
        bll[b][a] = min(bll[b][a], c);
    }
    
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            for(int k = 1; k <= n; k++){
                if(bll[j][i] == 1e18 || bll[i][k] == 1e18) continue;
                bll[j][k] = min(bll[j][k], bll[j][i] + bll[i][k]);
            }
        }
    }
    ans = min(ans,bll[u][v]);
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            if(bll[s][i] == 1e18 || bll[i][j] == 1e18 || bll[j][t] == 1e18) continue;
            if(bll[s][i] + bll[i][j] + bll[j][t] == bll[s][t]){
                ans = min(ans, bll[u][i] + bll[v][j]);
                ans = min(ans, bll[u][j] + bll[v][i]);
                
            }
        }
    }
    cout << ans;

}

• Subtask 1: 0 / 16
• Subtask 2: 0 / 15
• Subtask 3: 24 / 24
• Subtask 4: 0 / 45