Checksum Validation

#include <stdio.h>

int validate_checksum(int *mem, int n) {
    // Write your XOR scan logic here
    int j = 1, z;
    if(n > 2)
    {
        j = *(mem + 0);
        for(int i = 1; i < (n - 1); i++ )
        {
            z = (j ^ *(mem + i));
            j = z;
            /*
            j = *(mem + i);
            k = *(mem + (i+1));
            l = j^k;
            arr[i] = l;
            */
        }
        if(z == *(mem + (n -1)))
        {
            return 1;
        }
        //return 0;
    }
    else
    {
        if(n == 2)
        {
            if(*(mem + j) == *(mem + (++j)))
            {
                return 0;
            }
            return 1;
        }
    }
    return 0;
}

int main() {
    int n, arr[100];
    scanf("%d", &n);
    
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    int result = validate_checksum(arr, n);
    printf("%d", result);

    return 0;
}

Solving Approach