北京集训②DAY2 Mroning -未完

 1 #include <cmath>
 2 #include <cstdio>
 3 #include <cstdlib>
 4 #include <iostream>
 5 #include <algorithm>
 6 #include <map>
 7 #include <vector>
 8 #include <string>
 9 #include <cstring>
10 using namespace std;
11 int a[100005];
12 long long ans;
13 int main()
14 {
15     freopen("god.in","r",stdin);
16     freopen("god.out","w",stdout);
17     int n,m,A,B,i;
18     scanf("%d%d",&n,&m);
19     for (i=1; i<=n; i++) scanf("%d",&a[i]);
20     while (m--)
21     {
22         scanf("%d%d",&A,&B);
23         ans+=min(a[A],a[B]);
24     }
25     cout<<ans;
26     return 0;
27 }