/*
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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