제출 #1139398

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1139398		teo_55	Cheap flights (LMIO18_pigus_skrydziai)	C++20	53 / 100	883 ms	118596 KiB

pigus_skrydziai

#include<iostream>
#include<vector>
#include<map>
#define ll unsigned long long
#define int unsigned long long
const int NMAX=500005;
std::vector<ll>v(NMAX);
std::map<std::pair<int, int>, ll>mp;
std::vector<int>G[NMAX];
std::vector<int>dep(NMAX);
ll ans=0;
int n, m;
void dfs(int node, int parent)
{
    dep[node]=dep[parent]+1;
    for(auto next:G[node])
    {
        if(dep[next]==0)
            dfs(next, node);
        else if(dep[next]+2==dep[node] && dep[next])//triunghi
            ans=std::max(ans, mp[{next, node}]+mp[{next,parent}]+mp[{node,parent}]);
    }
}
signed main()
{
    std::cin>>n>>m;
    for(int i=0; i<m; ++i)
    {
        int from, to, cost;
        std::cin>>from>>to>>cost;
        v[from]+=cost;
        v[to]+=cost;

        mp[{from, to}]=cost;
        mp[{to, from}]=cost;

        G[from].push_back(to);
        G[to].push_back(from);
    }
    for(int i=1; i<=n; ++i)
        ans=std::max(ans, v[i]);

    for(int i=1; i<=n; ++i)
        if(!dep[i])
            dfs(i, 0);
    std::cout<<ans;
    return 0;
}

• Subtask 1: 12 / 12
• Subtask 2: 25 / 25
• Subtask 3: 16 / 16
• Subtask 4: 0 / 47