#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a,b;
	cin>>n;
	a=n%10*10;
	b=n/10;
	cout<<b+a;
	return 0;	
}
/**************************************************************
	Problem: 1606
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/