Colt Technology Coding Questions and Answers

#include <bits/stdc++.h>

using namespace std;

bool Pal(string s) {
    string s1 = s;
    reverse(s1.begin(), s1.end());
    return s1 == s;
}

int main() {
    string s;
    getline(cin, s);
    int i;
    for (i = 0; i < s.length() - 1; i++)
        if (Pal(s.substr(i, s.length() - i))) break;
    s = s.substr(0, i);
    reverse(s.begin(), s.end());
    cout << s;
}

import java.util.*;
public class Main {
  public static boolean isPalindrome(String str) {
    char arr[] = str.toCharArray();
    for (int i = 0, j = arr.length - 1; i < j; i++, j--)
      if (arr[i] != arr[j])
        return false;
    return true;
  }
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String str = sc.next();
    String res = "";
    for (int i = 0; i < str.length(); i++) {
      if (isPalindrome(str.substring(i, str.length()))) {
        res = str.substring(0, i);
        break;
      }
    }
    System.out.println(new StringBuilder(res).reverse());
  }
}

def ispalindrome(s):
    return s == s[::-1]

def solve(s):
    if ispalindrome(s):
        return None
    for i in range(len(s)):
        x = s[:i][::-1]
        if ispalindrome(s + x):
            return x

s = input()
print(solve(s))