Checksum Validation

Code

#include <stdio.h>

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

    // XOR of first (n-1) elements
    for (int i = 0; i < n - 1; i++) {
        xor_result ^= mem[i];
    }

    // Last element is checksum
    int checksum = mem[n - 1];

    return xor_result == checksum ? 1 : 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