#include<iostream>
using namespace std;
int main()
{
     int n;
     cout<<"nhap vao so n"<<endl;
     cin>>n;
     int a[20];
     int k=0;
     while(n>0)
     {
               a[k]=n%10;
               n=n/10;
               k++;
     }
     int m=0;
     int d=1;
     for(int i=(k-1);i>=0;i--)
     {
             m=m+a[i]*d;
             d=d*10;
     }
     cout<<m<<endl;
     system("pause");
}