a=list(map(int,input().split()))
d=1
kabu=0
ans=1000
while d<=n-1:
    if a[d]>a[d-1]:
        f=ans//a[d-1]
        kabu+=f
        ans=ans-a[d-1]*f
    if a[d]<a[d-1]:
        ans+=kabu*a[d-1]
        kabu=0
    d+=1
ans+=kabu*a[n-1]
print(ans)

        