#include <stdio.h>
 
int isPalindrome(char s[]){
	//関数の中だけを書き換えています
	int len = 0;
	while (s[len] != '\0') {
		len++;
	}
	int left = 0;
	int right = len - 1;
 
	while (left < right) {
		if (s[left] != s[right]) {
			return 0;
		}
		left++;
		right--;
	}
	return 1;
}
//メイン関数は書き換えなくてよいです
int main(){
    char s[100];
    scanf("%s",s);
    printf("%s -> %d\n",s,isPalindrome(s));
    return 0;
}

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