output_description: Print Q lines. The i-th line should contain the number of the trains that runs
  **strictly within** the section from City p_i to City q_i.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      N M Q
      L_1 R_1
      L_2 R_2
      :
      L_M R_M
      p_1 q_1
      p_2 q_2
      :
      p_Q q_Q
attempt: N, M, Q = map(int, input().split())
  
  LR = []
  pq = []
  
  for i in range(M):
      LR.append(list(map(int, input().split())))
  
  for i in range(Q):
      pq.append(list(
          map(int, input().split())))
  
  for i in pq:
      count = 0
      for j in LR:
          if j[0] >= i[0]:
              elif j[1] <= i[1]:
                  count += 1
  
      print(count)
  
problem_description: Statement
  
  In Takahashi Kingdom, there is a east-west railroad and N cities along it,
  numbered 1, 2, 3, ..., N from west to east. A company called _AtCoder Express_
  possesses M trains, and the train i runs from City L_i to City R_i (it is
  possible that L_i = R_i). Takahashi the king is interested in the following Q
  matters:
  
    * The number of the trains that runs **strictly within** the section from City p_i to City q_i, that is, the number of trains j such that p_i \leq L_j and R_j \leq q_i.
  
  Although he is genius, this is too much data to process by himself. Find the
  answer for each of these Q queries to help him.
samples: [{"input": "2 3 1\n    1 1\n    1 2\n    2 2\n    1 2", "output": "3\n    \n\nAs all the trains runs within the section from City 1 to City 2, the answer to\nthe only query is 3.\n\n* * *"}, {"input": "10 3 2\n    1 5\n    2 8\n    7 10\n    1 7\n    3 10", "output": "1\n    1\n    \n\nThe first query is on the section from City 1 to 7. There is only one train\nthat runs strictly within that section: Train 1. The second query is on the\nsection from City 3 to 10. There is only one train that runs strictly within\nthat section: Train 3.\n\n* * *"}, {"input": "10 10 10\n    1 6\n    2 9\n    4 5\n    4 7\n    4 7\n    5 8\n    6 6\n    6 7\n    7 9\n    10 10\n    1 8\n    1 9\n    1 10\n    2 8\n    2 9\n    2 10\n    3 8\n    3 9\n    3 10\n    1 10", "output": "7\n    9\n    10\n    6\n    8\n    9\n    6\n    7\n    8\n    10"}]