# 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 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--;
    }
 
    // ループが完了した場合、全ての対応する文字が一致したため回文である
    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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