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- #include <iostream>
- using namespace std;
- int main()
- {
- int N,M,i,j,x,m,q,l,a[20][20],s=0;
- cin>>N>>M;
- for(i=1;i<=N;i++)
- for(j=1;j<=M;j++)
- cin>>a[i][j];
- cin>>x;
- for(m=1;m<=x;m++)
- {
- cin>>q>>l;
- s=s+a[q][l];
- a[q][l]=0;
- }
- cout<<s;
- return 0;
- }
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