// editor4
#include<stdio.h>
int main(){
    int n,i,j;
    int sum = 0;
    int product = 1;
    scanf("%d", &n);
    if (n < 0){
        printf("Invalid input");
        return 0;
        int matrix[n][n];
        for (i = 0; i < n; i++){
            for (j = 0; j < n; j++){
                scanf("%d", &matrix[i][j]);
            }
        }
        for (i = 0; i < n; i++){
            sum += matrix[i][i];
            product *= matrix[i][i];
        }
        printf("sum:%d\n", sum);
        printf("Product:%d", product);
        return 0;
    }