text: # openjij の名前空間ではなく 
  # cxxjij の名前空間から直接呼ぶベンチマーク
  # (OpenJijと矛盾がないかチェックするために)
  
  
  import cxxjij
  import openjij as oj
  import numpy as np
  import time
  
  N= 1000
  h, J = {}, {}
  
  for i in range(N-1):
      for j in range(i+1, N):
          J[i, j] = -1 # np.random.uniform(-1, 1)
  
  BETA_MAX = 14000000
  BETA_MIN = 0.0015
  ONE_MCSTEP = 1
  NUM_CALL_UPDATER = 1000
  
  
  bqm = oj.BinaryQuadraticModel(h, J, var_type='SPIN')
  
  graph = bqm.get_cxxjij_ising_graph(sparse=False)
  
  init_spin = np.random.choice([-1, 1], N)
  system = cxxjij.system.make_classical_ising(init_spin.tolist(), graph)
  algorithm = cxxjij.algorithm.Algorithm_SingleSpinFlip_run
  schedule = cxxjij.utility.make_classical_schedule_list(
      beta_min=BETA_MIN, beta_max=BETA_MAX,
      one_mc_step=ONE_MCSTEP,
      num_call_updater=NUM_CALL_UPDATER
  )
  
  start = time.time()
  algorithm(system, schedule)
  elapsed_time = time.time() - start
  print("\telapsed_time:{0}".format(elapsed_time) + "[sec]")