Answer 5 Looping Py

n =int(input())
maxi = float("-inf")
secondmax = float("-inf")
count = 0
if n!=0:
    lst = [int(i) for i in input().split()]
while count<n:
    num = lst[count]
    if num>maxi:
        secondmax = maxi
        maxi = num
    elif num>secondmax and num!=maxi:
        secondmax=num
    count+=1
if(secondmax!=float("-inf")):
    print(secondmax)
else:
    print("-2147483648")