n=int(input())
I=list(map(int,input().split()))
num=1000
if max(I)==I[0]:
    print("1000")
    exit()
for i in range(1,n+1):
    if I[i-1]<I[i]:
        num-=(num//I[i-1])*I[i-1]
        num+=(num//I[i-1])*I[i]

print(num)
