#include<iostream> #include<cstdio> //scanf()\printf() #include<cstring> #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n,sum=0; cin>>n; while(n!=0){ sum=sum*10+n%10; n/=10; } cout<<sum; return 0; }