#include <bits/stdc++.h>
using namespace std;
int n;
int main() {
    cin>>n;
    int d=0;
    while (n>0){
        d=d*10+n%10;
        n/=10;
    }
    cout<<d;
	return 0;
}

#include<bits/stdc++.h> using namespace std; int main (){ int a,s,d,f,g; cin>>a; s=a/1000%10; d=a/100%10; f=a/10%10; g=a%10; if(g!=0) cout<<g; if(f!=0) cout<<f; if(d!=0) cout<<d; if(s!=0) cout<<s; //cout<<g<<f<<d<<s; return 0; }