Checksum Validation

Code

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

int validate_checksum(int *mem, int n) {
    // Write your XOR scan logic here
    /*
    checksum: XOR all element one by one
    */
    uint8_t checksum = 0;
    /*
    for (int i = 0; i < (n - 1); i++)
    {
        checksum ^= mem[i];
    }
    if (checksum == mem[n - 1])
    {
        return 1;
    }
    */
    int *ptr = mem; // ptr = mem = address of first element of the array

    for (uint8_t i = 0; i < (n - 1); i++)
    {
        checksum ^= *ptr;
        ptr++;
    }

    return checksum == *ptr ? 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