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

# dp[i]: うどん札をi枚使った時の割引額の最大値
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[N])