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

dp = [0] * N
dp[0] = 1000

for i in range(1, N):
    dp[i] = dp[i - 1]
    for j in range(i - 1):
        V = dp[j] // A[j]
        W = dp[j] + (A[i] - A[j]) * V
        dp[i] = max(dp[i], W)

print(dp[N])