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

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

print(dp[-1])