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
 # 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]
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+low = 0
+high = len(num_list)-1
+while high >= low:
+    num = (low + high) // 2
+    baba = num_list[num]
+    if baba == num:
+        print(sssssssssssssssssssssssssssb)
+        break
+    elif num > baba:
+        high = num - 1
+    else:
+        low = num + 1
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