n=int(input())
ss=n
l=[]
a=int(input())
b=int(input())
c=int(input())
d=int(input())
e=int(input())
t=0
bb,cc,dd,ee,ff=0,0,0,0,0
while ff==0:
    if ee>0:
        ff+=min(ee,e)
        ee-=min(ee,e)
    if dd>0:
        ee+=min(dd,d)
        dd-=min(dd,d)
    if cc>0:
        dd+=min(cc,c)
        cc-=min(cc,c)
    if bb>0:
        cc+=min(bb,b)
        bb-=min(bb,b)
    if n>0:
        bb+=min(n,a)
        n-=min(n,a)
    t+=1
if ss==ff:
    print(t)
else:
    print(ss//ff+t)
