N = int(input())
A = list(map(int, input().split()))

money = 1000
kabu = 0
toku = 0
min_val = 10000

for i in range(N):
    if (A[i] < min_val):
        min_val = A[i]

    if (A[i] > min_val):
        money += (money // min_val) * (A[i] - min_val)
        min_val = 10000

print(money)
