N=int(input())
ls=[int(s) for s in input().split()]
money=1000
stock=0
for i in range(N-1):
  if ls[i]<ls[i+1]:
    while money>=ls[i]:
      money-=ls[i]
      stock+=1
  elif ls[i]>ls[i+1]:
    while stock>0:
      money+=ls[i]
      stock-=1
while stock>0:
  money+=ls[N-1]
  stock-=1
print(money)