#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <stdlib.h>

using namespace std;

int n;
vector<string> vec;
vector<int> vec2;

int main(void)
{
	string s;
	while(getline(cin, s)){
		vec.push_back(s);
	}
	if(vec.size() == 2){
		cout << "\"assert\"" << endl;
		return 0;
	}
	
	vec2.push_back(atoi(vec[1].c_str()) + atoi(vec[2].c_str()));
	vec2.push_back(atoi(vec[1].c_str()) + atoi(vec[2].c_str()));
	vec2.push_back(atoi(vec[2].c_str()) + atoi(vec[3].c_str()));
	sort(vec2.rbegin(), vec2.rend());
	vec2.erase(unique(vec2.begin(), vec2.end()), vec2.end());
	
	cout << vec2[1] << endl;
	
	return 0;
}