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())
  data = [list(map(int, input().split())) for _ in range(N)]
  
  ans = 10**19
  for a in range(N):
      for b in range(N):
          for c in range(N):
              for d in range(N):
                  x0 = data[a][0]
                  x1 = data[b][0]
                  y0 = data[c][1]
                  y1 = data[d][1]
                  if x0 < x1 and y0 < y1:
                      count = 0
                      for i, j in data:
                          if x0 <= i <= x1 and y0 <= j <= y1:
                              count += 1
                      if count >= K:
                          ans = min(ans, (x1 - x0) * (y1 - y0))
  
  print(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"}]