n = int(input())
A,B,C = map(int,input().split())
dp = [0]*(n+1)

def calc(dp,x,y):
    
    for i in range(n):
        if i+x <= n:
            dp[i+x] = max(dp[i+x],dp[i]+y)
    return dp


for x,y in [[3,A],[5,B],[10,C]]:
    dp = calc(dp,x,y)
    # print(dp)
print(max(dp))