import sys, time, random from collections import deque, Counter, defaultdict input = lambda: sys.stdin.readline().rstrip() ii = lambda: int(input()) mi = lambda: map(int, input().split()) li = lambda: list(mi()) inf = 2 ** 63 - 1 mod = 998244353 n = ii() a, b, c = mi() dp = [0] * (n + 100) for i in range(n): dp[i + 3] = max(dp[i] + a, dp[i + 3]) dp[i + 5] = max(dp[i] + b, dp[i + 5]) dp[i + 10] = max(dp[i] + c, dp[i + 10]) print(dp[n])