save project

binary_search.py

 # 使用二分查找法，找出9和20在列表里面的索引
-num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
\ No newline at end of file
+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+num=20
+low=0
+high=len(num_list)-1
+while low<=high:
+    mid=(low+high)//2
+    a=num_list[mid]
+    if a == num:
+        print(mid)
+        break
+    elif a<=num:
+        low=num+1
+    elif:
+        high+mid-1
+        
+    
+    
\ No newline at end of file