Checksum Validation

Code

#include <stdio.h>

int validate_checksum(int *mem, int n)
{
    int res = mem[0];

    for (int i = 1; i < n-1; i++) {
        res ^= mem[i];
    }

    if (res == mem[n-1])
        return 1;   // checksum valid
    else
        return 0;   // checksum error
}

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