Checksum Validation

Code

#include <stdio.h>
#include <stdint.h>

int validate_checksum(int *mem, int n) {
    uint8_t cs = 0;
    do {
        cs ^= (uint8_t)*mem++;
    } while ((--n) - 1);
    return (((uint8_t)*mem) ^ cs) ? 0 : 1;
}

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