#include <stdio.h>
int a[3][3] = {{1,0,3},{0,5,6},{7,0,9}};

int main() {
    int s = 0;
    for (int i = 0; i < 3; i++)
        for(int j = 0; j < 3; j++) {
            s += a[i][j];            
        }
return s;
}