func_code_string: #include <bits/stdc++.h>   using namespace std;   ifstream fin( A.in );   ofstream fout( A.out );   int n, m, a, b, v[100001], viz[100001];   vector<int> G[100001];   long long sum;   struct sor {     int x, i;   } s[100001];   bool cmp(sor a, sor b) { return a.x > b.x; }   int main() {     cin >> n >> m;     for (int i = 1; i <= n; ++i) {       cin >> v[i];       s[i].x = v[i];       s[i].i = i;     }     for (int i = 1; i <= m; ++i) {       cin >> a >> b;       G[a].push_back(b);       G[b].push_back(a);     }     sort(s + 1, s + n + 1, cmp);     for (int i = 1; i <= n; ++i) {       viz[s[i].i] = 1;       for (vector<int>::iterator it = G[s[i].i].begin(); it != G[s[i].i].end();            ++it) {         if (!viz[*it]) sum += v[*it];       }     }     cout << sum;   }   