5_2_reverse_a_number.cpp

#include<iostream>
using namespace std;

int main(){

    int n;
    cin>>n;

    int reverse=0;

    while(n>0){
        int lastdigit=n%10;
        reverse=reverse*10 + lastdigit;
        n=n/10;
    }
    cout<<reverse;
    
    return 0;
}