#include <iostream>
#include <stack>
using namespace std;

string reverse(string s) {
    stack<char> st;
    
    // Push all characters onto the stack
    for (char c : s)
        st.push(c);
    
    // Pop characters to form reversed string
    string res;
    while (!st.empty()) {
        res += st.top();
        st.pop();
    }
    return res;
}

int main() {
    string s = "geeksforgeeks";
    cout << s << endl;
    cout << reverse(s) << endl;
    return 0;
}

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

void reverse(char* s) {
    int n = strlen(s);
    for (int i = 0; i < n / 2; i++) {
        char temp = s[i];
        s[i] = s[n - i - 1];
        s[n - i - 1] = temp;
    }
}

int main() {
    char s[] = "geeksforgeeks";
    printf("%s\n", s);
    reverse(s);
    printf("%s\n", s);
    return 0;
}

import java.util.Stack;

public class GfG {
    public static String reverse(String s) {
        Stack<Character> stack = new Stack<>();
        // Push all characters onto the stack
        for (char c : s.toCharArray())
            stack.push(c);
        // Pop characters to form reversed string
        StringBuilder res = new StringBuilder();
        while (!stack.isEmpty()) {
            res.append(stack.pop());
        }
        return res.toString();
    }

    public static void main(String[] args) {
        String s = "geeksforgeeks";
        System.out.println(s);
        System.out.println(reverse(s));
    }
}

def reverse(s):
    # Use slicing to reverse the string
    return s[::-1]

s = "geeksforgeeks"
print(s)
print(reverse(s))

using System;
using System.Collections.Generic;

class GfG {
    static string Reverse(string s) {
        Stack<char> stack = new Stack<char>();
        // Push all characters onto the stack
        foreach (char c in s)
            stack.Push(c);
        // Pop characters to form reversed string
        char[] res = new char[s.Length];
        int i = 0;
        while (stack.Count > 0) {
            res[i++] = stack.Pop();
        }
        return new string(res);
    }

    static void Main() {
        string s = "geeksforgeeks";
        Console.WriteLine(s);
        Console.WriteLine(Reverse(s));
    }
}

function reverse(s) {
    // Convert string to array, reverse it, and join back to string
    return s.split('').reverse().join('');
}

let s = "geeksforgeeks";
console.log(s);
console.log(reverse(s));