#include <iostream>
using namespace std;

int main(){
    int n, m;
    cin >> n >> m;
    long long a = 0;
    long long sum = 0;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cin >> a;
            sum += a;
        }
    }
    cout << sum << endl;
}