N = int(input())
A,B,C = map(int,input().split())
dp = [0]*(N+1)
dp[1] = 0
for i in range(2,N+1):
    dp[i] = dp[i-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(dp[N])