# include <stdio.h>
 
int isPalindrome(char s[]){
	//関数の中だけを書き換えてください
	//回文になっているとき１を返す
	//回文になっていないとき０を返す
	 int i = 0;
    int j = 0;
 
    // 長さを求める
    while (s[j] != '\0') j++;
    j--;  // 最後の文字
 
    // 前後比較
    while (i < j) {
        if (s[i] != s[j]) {
            return 0;
        }
        i++;
        j--;
    }
 
    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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