r,p,q=map(int,input().split())
a,b,c,d=map(int,input().split())
v=[a,b,c]
v.sort()
a,b,c=v[0],v[1],v[2]
rest=r
if rest<a*p:
  print(rest//p)
  exit()
result=a
rest-=a*p
y=b-a
if y*(p+q)<=rest:
  rest-=y*(p+q)
  result+=y
else:
  result+=rest//(p+q)
  rest=0
z=c-b
if z*(p+2*q)<=rest:
  result+=z
  rest-=z*(p+2*q)
else:
  result+=rest//(p+2*q)
  rest=0
count=(a+b+c+d)//3-z
if count>0:
  if count*(p+3*q)<=rest:
    result+=count
  else:
    result+=rest//(p+3*q)
    rest=0
result=min(result,(a+b+c+d)//3)
print(result)