import sys
input = sys.stdin.readline

N=int(input())
A,B,C=map(int,input().split())


dp = [0]*(N+1)

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


print(dp[-1])