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

print(max(dp))