#include<stdio.h>
#include<string.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(){
    char str[] = "radar";
    int n = strlen(str);
    int result = ispalindrome(str, n);
    printf("%d\n", result);
    return 0;
}