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):
    for j in range(i-3+1):
        dp[i] = max(dp[i], dp[j]+A)
    for j in range(i-5+1):
        dp[i] = max(dp[i], dp[j]+B)
    for j in range(i-10+1):
        dp[i] = max(dp[i], dp[j]+C)
print(dp[-1])