#include <bits/stdc++.h> using namespace std;

int main() { int a, b, c; cin >> a; b = a / 100; c = a % 10; cout << b + c; return 0; }

#include <bits/stdc++.h>
using namespace std;

int main() {
	int a,b,c;
	cin >> a;
	b = a % 10;
	c = a / 100;
    cout<<b+c;
	return 0;
}