code: def main():
      print("GRAPHDOUBLE")
      test(GraphDouble, 100)
      print("GRAPHFLOAT")
      test(GraphFloat, 100)
      print("GRAPHINT")
      test(GraphInt, 100)
  
imports: from maxflow import GraphDouble, GraphFloat, GraphInt
  import random
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types