#include"bits/stdc++.h"
using namespace std;
int main(){
	long a, b, c; string s;
	getline(cin, s);
	getline(cin, s);
	for (int i = 0; i < s.size(); i++) {
		if (s[i] == ' ') {
			cout << '"' << 'a' << 's' << 's' << 'e' << 'r' << 't' << '"' << endl;
			return 0;
		}
	}
	a = atol(s.c_str());
	cin >> b >> c;
	long n = a + b; a = a + c; b = b + c;
	c = max({ n,a,b });
	if (n == c)n = 0;
	if (a == c)a = 0;
	if (b == c)b = 0;
	cout << max({ n, a, b }) << endl;
}