#############################################################

import sys
sys.setrecursionlimit(10**7)

from heapq import heappop,heappush
from collections import deque,defaultdict,Counter
from bisect import bisect_left, bisect_right
from itertools import product,combinations,permutations

ipt = sys.stdin.readline

def iin():
    return int(ipt())
def lmin():
    return list(map(int,ipt().split()))

MOD = 998244353
#############################################################

N = iin()
A,B,C = lmin()

inf = 1<<60

dp = [-inf]*(N+1)
dp[0] = 0
for i in range(1,N+1):
    if i >= 3:
        dp[i] = max(dp[i],dp[i-3]+A)
    if i >= 5:
        dp[i] = max(dp[i],dp[i-5]+B)
    if i >= 10:
        dp[i] = max(dp[i],dp[i-10]+C)

print(max(dp))