n = int(input())
a,b,c = map(int,input().split())
dp = [0]+[-1]*(n+7)
for i in range(n-2):
    if dp[i]==-1: continue
    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(max(dp[:n+1]))