#include <stdio.h>

int sumMatrix(int m, int n, int matrix[m]) {
    int sum = 0;
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            sum += matrix[i][j];   
        }
    }
    return sum;
}

int main(){
    int m, n;
    scanf("%d %d", &m, &n);
    int matrix[m];
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            scanf("%d", &matrix[i][j]);
        }
    }
    int total_sum = sumMatrix(m, n, matrix);
    printf("%d\n", total_sum);
    return 0;
}