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