// Online C compiler to run C program online
#include <stdio.h>
void upis(int *n, int a[][10])
{
    int i, j;
    printf("Unesite n: ");
    scanf("%d", n);
    printf("Unesite niz: ");
    for (i=0; i<*n; i++)
    {
        for(j=0; j<*n; j++)
        {
            scanf("%d", &a[i][j]);
        }
    }
}
void pisi(int a[][10], int n)
{
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            printf("%d\t", a[i][j]);
        }
        printf("\n");
    }
}
int zbirglavne(int n, int a[][10])
{
    int i, s=0, j;
    for (i = 0; i < n; i++)
    {
        for (j = 0; j < n; j++)
        {
            if (i == j)
            {
                s = s+a[i][j];
            }
        }
    }   
    return s;
}
int zbirsporedne(int n, int a[][10])
{
    int i, s=0, j;
    for (i = 0; i < n; i++)
    {
        for (j = 0; j < n; j++)
        {
            if (i+j == n-1)
            {
                s = s+a[i][j];
            }
        }
    }   
    return s;
}
int zbirtrougao(int n, int a[][10])
{
    int i, s=0, j;
    for (i = 0; i < n; i++)
    {
        for (j = 0; j < n; j++)
        {
            if (i < j)
            {
                s = s+a[i][j];
            }
        }
    }   
    return s;
}
int zbirdonji(int n, int a[][10])
{
    int i, s=0, j;
    for (i = 0; i < n; i++)
    {
        for (j = 0; j < n; j++)
        {
            if (i > j)
            {
                s = s+a[i][j];
            }
        }
    }   
    return s;
}
int main() {
    int a[10][10], n;
    upis(&n, a);
    printf("Ispis matrice: \n");
    pisi(a, n);
    printf("Zbir glavne dijagonale je: %d\n", zbirglavne(n, a));
    printf("Zbir sporedne dijagonale je: %d\n", zbirsporedne(n, a));
    printf("Zbir gornjeg trougla je: %d\n", zbirtrougao(n, a));
    printf("Zbir donjeg trougla je: %d\n", zbirdonji(n, a));
    return 0;
}