## https://yukicoder.me/problems/no/2386


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

    dp = [-float("inf")] * ( N + 1)
    dp[0] = 0
    for i in range(1, N + 1):
        if i - 3 >= 0:
            dp[i] = max(dp[i], dp[i - 3] + A)
        if i - 5 >= 0:
            dp[i] = max(dp[i], dp[i - 5] + B)
        if i - 10 >= 0:
            dp[i] = max(dp[i], dp[i - 10] + C)
    
    x = max(dp)
    print(x)






if __name__ == "__main__":
    main()