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])