#include <algorithm>
#include <climits>
#include <cmath>
#include <iomanip>
#include <iostream>
#include <map>
#include <set>
#include <sstream>
#include <numeric>
#include <string>
#include <vector>



int main()
{
	int A1, A2, A3, B;
	std::cin >> A1 >> A2 >> A3 >> B;

	int bestx3 = 3 * std::max({ A1, A2, A3 });
	int combo = A1 + A2 + A3 + B;
	int ans = std::max(bestx3, combo);

	std::cout << ans << '\n';

}