comefrom: <qiyuangong>560_Subarray_Sum_Equals_K_1.py
code: def subarraySum( nums, k):
      sum_map = {}
      sum_map[0] = 1
      count = curr_sum = 0
      for num in nums:
          curr_sum += num
          count += sum_map.get(curr_sum - k, 0)
          sum_map[curr_sum] = sum_map.get(curr_sum, 0) + 1
      return count
masked: def sample_funcname ( var_0 , var_1 ) :
      var_2 = { }
      var_2 [ 0 ] = 1
      var_6 = var_5 = 0
      for var_7 in var_0 :
          var_5 += var_7
          var_6 += var_2.get ( var_5 - var_1 , 0 )
          var_2 [ var_5 ] = var_2.get ( var_5 , 0 ) + 1
      return var_6
  