auto save

diy1.py

@@ -7,5 +7,5 @@ for a in range(0, 1000):
         list1.insert(0, 0)
 end_time=time.time()
 print("结束时间",end_time)
-result=start_time-end_time
+result=end_time-start_time
 print("耗时时间",result)
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