n  = int(input())
ai = list(map(int, input().split()))

def short_long_decisions(xs):
    return [ *map(lambda t: t[0] <= t[1], zip(xs[:-1], xs[1:])), False ]

money   = 1000
stocks  = 0
actions = short_long_decisions(ai)

for i, action in enumerate(actions):
    if action:
        money %= ai[i]
        stocks += money // ai[i]

    else:
        money += stocks * ai[i]
        stocks = 0

print(money)