
n = int(input())
money = 1000
stock = 0
(*a,) = map(int, input().split())

for i in range(n - 1):
    if a[i] < a[i + 1]:
        stock = money // a[i]
        money = money % a[i]
    elif a[i] > a[i + 1]:
        money += stock * a[i]
        stock = 0
    else:
        pass
money += stock * a[-1]
print(money)