#include <iostream>
#include <vector>
using namespace std;
int main() {int m, n, cx, cy;
cin >> m >> n;
vector<int>a;
a. reserve(m*n);
for (int i = 0;i < m;++i) {
for(int j = 0;j < n;++j) {
int v;
cin >> v;
a. push_back(v);
}
}
int x;
int value = 0;
cin >> x;
for (int k = 0;k < x;++k) {
cin >> cx >> cy;
if((a[cy-1 + (cx-1)*cy]) != -100) {
value += a[cy-1 + (cx-1)*cy];
a[cy-1 + (cx-1)*cy] = -100;
}
}cout << value;
}