save project

diy1.py

+import time
+
+start_time=time.time()
+print ("开始时间为"，start_timestart_time)
 list1 = []
 list1 = []
 for a in range(0, 1000):
 for a in range(0, 1000):
     for b in range(0, 1000):
     for b in range(0, 1000):