#include <stdio.h>
#define SIZE 4

int sum_diagonal_top_left(int grid[SIZE][SIZE]);
int sum_diagonal_top_right(int grid[SIZE][SIZE]);

int main(void) {
    int grid[SIZE][SIZE] = {{3, 5, 1, 2},
                            {2, 4, 9, 8},
                            {6, 0, 2, 7},
                            {4, 1, 6, 5}};

    printf("The sum diagonal top left %d\n", sum_diagonal_top_left(grid));
    printf("The sum diagonal top right %d\n", sum_diagonal_top_right(grid));
   
    return 0;
}

/*
int sum_diagonal_top_left(int grid[SIZE][SIZE]){
    int sum = 0;
    for (int row = 0; row < SIZE; row++) {    
        for (int col = 0; col < SIZE; col++ ) {
            if (row == col) {
                sum = sum + grid[row][col];  
            }       
        }
    } 
    return sum;
}
*/
int sum_diagonal_top_left(int grid[SIZE][SIZE]){
    int sum = 0;
    for (int i = 0; i < SIZE; i++) {    
        sum = sum + grid[i][i];
    } 
    return sum;
}


int sum_diagonal_top_right(int grid[SIZE][SIZE]){
   int sum = 0;
    for (int row = 0; row < SIZE; row++) {    
        for (int col = 0; col < SIZE; col++ ) {
            if (row + col == SIZE - 1) {
                sum = sum + grid[row][col];  
            }       
        }
    } 
    return sum;
}