/*
Developed by Ganesh Sawhney
*/
 
#include <bits/stdc++.h>
 
using namespace std;
typedef long long ll;
 
int main()
{
    //ifstream in("test3.txt");
    //ofstream out("output.txt");
 
    int n,m;
    cin>>n>>m;
    int w[n];
    ll ans=0;
    for(int i=0;i<n;i++)
    {
        cin>>w[i];
    }
    for(int i=0;i<m;i++)
    {
        int a,b;
        cin>>a>>b;
        a--,b--;
        ans+=min(w[a],w[b]);
    }
    cout<<ans<<endl;
    return 0;
}
 

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