445C - DZY Loves Physics - CodeForces Solution


graphs greedy *1600

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C++ Code:

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

typedef long long ll;
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    // int t;cin>>t;
    // while(t--){
        int n,m;cin>>n>>m;
        vector<int> v(n+1);
        for (int i = 1; i < n+1; i++)
        {
            cin>>v[i];
        }
        double ans=0;
        for (int i = 0; i < m; i++)
        {
            int a,b,c;
            cin>>a>>b>>c;
            ans=max(ans,double(v[a]+v[b])/c);
        }
        cout<<fixed<<setprecision(9)<<ans;
        
        
    // }
    return 0;
}


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