#include<bits/stdc++.h>
using namespace std;
int main() {
	int x,a,b;
	cin>>x;
	a=x%10;
	b=x/100*10;
	cout<<a+b;
}
/**************************************************************
	Problem: 1615
	User: linzihang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/