#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c; cin>>a; if(a>0){ while(a!=0){ b=a%10; a=(a-b)*1.0/10; cout<<b; } }else if(a<0){ c=0-a; cout<<"-"; while(c!=0){ b=c%10; c=(c-b)*1.0/10; cout<<b; } }else{ cout<<0; } return 0; }