#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <ctype.h>

#define MAX_STR_LEN 102

void removeAllChars(char str[], char toRemove[]);
bool isExist(char str[], char search[]);
bool isPalindrome(char str[]);
void lowerString(char str[]);


int main()
{
    char str[MAX_STR_LEN] = { 0 };
    printf("Enter string (max length 100 chars): ");

    fgets(str, MAX_STR_LEN, stdin); //get input
    str[strcspn(str, "\n")] = 0; //removes the \n

    //string modifying
    lowerString(str); //lower the string
    removeAllChars(str, " "); //remove all spaces (escape whitespaces)

    if (isPalindrome(str))
    {
        printf("Yes\n");
    }
    else
    {
        printf("No\n");
    }

    return 0;
}
/*
Removes all overlaps of string2 in string1 ! CASE SENSITIVE !
input: string1, string2
output: -
example:
    before: this is test string (string to remove = "i")
    after: ths s test strng
    (all "i" got removed from the string)
*/
void removeAllChars(char str[], char toRemove[])
{
    while (isExist(str, toRemove))
    {
        int index = strcspn(str, toRemove), i = 0;

        for (i = index; str[i]; i++)
        {
            str[i] = str[i + 1];
        }
    }
}
/*
Checks if string2 characters exist in string1
input: string1, string2
output: true - if exist, false - if not
*/
bool isExist(char str[], char search[])
{
    if (strcspn(str, search) == strlen(str)) //if char doesn't exist in the string, it's returns the length of the string = FALSE (char doesn't exist.)
    {
        return false;
    }
    else
    {
        return true;
    }
}
/*
Checks if the given string palindrome
input: string
output: true if palindrome, false if not
*/
bool isPalindrome(char str[])
{
    int i = 0, j = 0;

    for (i = 0, j = strlen(str) - 1; str[i]; i++, j--)
    {
        if (str[i] != str[j])
        {
            return false;
        }
    }
    return true;
}
/*
lowers all chars in the string
input: string
output: -
example:
    before: This Is Test String
    after: this is test string
*/
void lowerString(char str[])
{
    int i = 0;

    for (i = 0; str[i]; i++){
        str[i] = tolower(str[i]);
    }
}