N = int(input())
A, B, C = map(int, input().split())
dp = [0] * (1 << 18)
for i in range(N):
    dp[i + 3] = max(dp[i + 3], dp[i] + A)
    dp[i + 5] = max(dp[i + 5], dp[i] + B)
    dp[i + 10] = max(dp[i + 10], dp[i] + C)
print(dp[N])