#include <stdlib.h>
#include <stdbool.h>

bool isPalindrome(int x) {
    // negatives and numbers ending in 0 (except 0 itself) are not palindromes
    if (x < 0 || (x % 10 == 0 && x != 0))
        return false;

    int reversedHalf = 0;

    while (x > reversedHalf) {
        reversedHalf = reversedHalf * 10 + x % 10;
        x /= 10;
    }

    // for even digits: x == reversedHalf
    // for odd digits:  x == reversedHalf / 10
    return (x == reversedHalf) || (x == reversedHalf / 10);
}


int main(int argc, char *argv[])
{
  return EXIT_SUCCESS;
}