Palindrome

Lab C++ Beginner 10 points

Read a word and print yes if it reads the same backwards (case-insensitive), else no. Build the reverse with string(s.rbegin(), s.rend()).

Input

One word.

Output

yes or no

Example

Input

Level

Output

yes

Sample input available Sample output available

Editor

C++

Hints

rbegin()/rend() iterate backwards.

Strings compare with ==.

Solution explanation

Constructing a string from a pair of iterators copies that range of characters.

Show solution

#include <iostream>
#include <string>
#include <cctype>
using namespace std;

int main() {
    string s;
    cin >> s;
    for (char &c : s) c = tolower(c);
    string reversed(s.rbegin(), s.rend());
    cout << (s == reversed ? "yes" : "no") << "\n";
    return 0;
}

Output

Answer