#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c;
    cin>>a;
    b=a/10;
    c=a%10*10;
    cout<<b+c<<endl;
    return 0;
}
/**************************************************************
	Problem: 1606
	User: wuhanyu
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/