#include <iostream>
#include <string>
#include <set>
using namespace std;
int main(void) {
	string n;
	getline(cin, n);
	string s, t, u;
	getline(cin, s);
	if (s.find(' ') != string::npos) {
		cout << "\"assert\"" << endl;
		exit(0);
	}
	getline(cin, t);
	getline(cin, u);
	long long a = stoll(s), b = stoll(t), c = stoll(u);
	set<long long> st;
	st.insert(a + b), st.insert(b + c), st.insert(c + a);
	auto itr = st.end();
	--itr, --itr;
	cout << *itr << endl;
	return 0;
}