auto save

diy1.py

 import time
 
 start_time = time.time()
+list1=[]
 print("开始的时间:",start_time)
 for a in range(0, 1000):
     for b in range(0, 1000):
-        c = 1000-a-b
-            if a**2 + b**2 == c**2:
-                print("a,b,c的值为:",a,b,c)
+        list1.append(0)
+        
 end_time=time.time()
 print("结束的时间为:",end_time)  
 
+result= end_time - start_time
+print("总耗时:",result)
+
 

diy2.py

+alist=[20,17,9,13,5,6]
+
+n=len(alist)