#include <stdio.h>
#include <string.h>

int isPalindrome(int n) {
	char s[100] = {0};
	int i = 0, j = 0;
	while (n > 0) {
		s[i++] = n % 10 + 48;
		n /= 10;
	}
	i = 0, j = strlen(s) - 1;
	while (i <= j) {
		if (s[i++] != s[j--])
			return 0;
	}
	return 1;
}

int main(int argc, char *argv[])
{
	for (int i = 0; i < 100; i++) {
		if (isPalindrome(i * i))
			printf("%d\n", i);
	}
	return 0;
}