// TakProg2.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <vector>
#include <tuple>
using namespace std;
int main()
{
    int n, m;
    cin >> n >> m;
    vector<int>niz;
    int broj,broj2;
    long long int naj = 0;
    
    for (int i = 0; i < n; i++) {
        
        cin >> broj;
        niz.push_back(broj);
    }
    
    
    for (int i = 0; i < m; i++) {
       
        cin >> broj >> broj2;

        naj += max(niz[broj-1]+niz[broj2-1], -niz[broj-1]  -niz[broj2-1]);
        
    }
    cout << naj;

}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file