n=int(input())
a,b,c=map(int,input().split())
q=[0]*(n+1)
for i in range(1,n+1):
  q[i]=q[i-1]
  if i>=3:
    q[i]=max(q[i],q[i-3]+a)
  if i>=5:
    q[i]=max(q[i],q[i-5]+b)
  if i>=10:
    q[i]=max(q[i],q[i-10]+c)
print(q[n])