output_description: Among A, B and C, print the integer that is different from the rest.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      A B C
attempt: n, k = map(int, input().split())
  l = [list(map(int, input().split())) for i in range(n)]
  x = [l[i][0] for i in range(n)]
  x.sort()
  y = [l[i][1] for i in range(n)]
  y.sort()
  ans = []
  for i1 in range(n):
      for i2 in range(n):
          for i3 in range(n):
              for i4 in range(n):
                  ct = 0
                  for i5 in range(n):
                      if min(x[i1], x[i2]) <= l[i5][0] <= max(x[i1], x[i2]) and min(
                          y[i3], y[i4]
                      ) <= l[i5][1] <= max(y[i3], y[i4]):
                          ct += 1
                  if ct >= k:
                      ans.append(abs(x[i1] - x[i2]) * abs(y[i3] - y[i4]))
  print(min(ans))
  
problem_description: Statement
  
  You are given three integers, A, B and C.  
  Among them, two are the same, but the remaining one is different from the
  rest.  
  For example, when A=5,B=7,C=5, A and C are the same, but B is different.  
  Find the one that is different from the rest among the given three integers.
samples: [{"input": "5 7 5", "output": "7\n    \n\nThis is the same case as the one in the statement.\n\n* * *"}, {"input": "1 1 7", "output": "7\n    \n\nIn this case, C is the one we seek.\n\n* * *"}, {"input": "-100 100 100", "output": "-100"}]