제출 #1139394

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1139394		teo_55	Cheap flights (LMIO18_pigus_skrydziai)	C++20	0 / 100	291 ms	45972 KiB

pigus_skrydziai

#include<iostream>
#include<vector>
#include<map>
#define ll 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)
{
    for(auto it:G[node])
    {
        int next=it;
        if(dep[next]==0)
        {
            dep[next]=dep[node]+1;
            dfs(next, node);
        }
        else
            if(dep[next]+2==dep[node])//triunghi
                ans=std::max(ans, mp[{std::min(next, node), std::max(next, node)}]+mp[{std::min(next, parent),std::max(next, parent)}]+mp[{std::min(parent, node),std::max(parent, node)}]);
    }
}
int 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;
        if(from>to)
            std::swap(from, to);

        mp[{from, to}]=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])
        {
            dep[i]=1;
            dfs(1, 0);
        }
    std::cout<<ans;
    return 0;
}

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• Subtask 3: 0 / 16
• Subtask 4: 0 / 47