int input max for in range int input if max max max max max max elif m

n = int(input())
max = [0,0,0]
k = 0
for i in range(n):
   x = int(input())
   if x > max[0]:
      max[2] = max[1]
      max[1] = max[0]
      max[0] = x
   elif x > max[1]:
      max[2] = max[1]
      max[1] = x
   elif x > max[2]:
      max[2] = x
      k = 1
if k == 0:
   print('#')
else:
   print(max[2])