#include<stdio.h>
#include<ctype.h>
int isPalindrome(char *str, int size){
    if(size <= 0){
        printf("Invalid Input\n");
        return 0;
    }
    char *start = str;
    char *end = str + size -1;
    while(start < end){
        if(*start != *end)
            return 0;
        
        start++;
        end--;
    }
    return 1;
}
int main(){
    int n;
    char str[1001];
    scanf("%d", &n);
    scanf("%s", str);
    if(n != strlen(str)){
        printf("Invalid Input\n");
        return 0;
    }
    int result = isPalindrome(str, n);
    printf("%d\n", result);
    return 0;
}