#include <iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;
    if (n%10==0) n/=10;
    while (n!=0)
    {
        cout<<n%10;
        n/=10;
    }
}

$\color{#1fdb91}{\texttt{C}}\color{#0aaec9}{\texttt{+}}\color{#e9418e}{\texttt{+}}$

#include <bits/stdc++.h>

using namespace std;

int main() {
    string s; cin >> s;
    reverse(s.begin(), s.end());
    cout << stoi(s);
}

\begin{array}{c|c|c}\color{#ffd710}{\texttt{\{}} \color{#8655d6}{\texttt{\{}}\ \ \color{#8cdcda}{\text{Daoanhviet96}}\ \ \color{#8655d6}{\texttt{\}}} \color{#ffd710}{\texttt{\}}}\end{array}