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]
\ No newline at end of file
+def chazhao(num):
+    low = 0
+    big = len(num_list)-1
+    while low <= big:
+        mid = (int(low)+int(big)) // 2
+        guess = num_list[mid]
+        if guess == int(num):
+            print('NMSL')
+            break
+        elif guess < int(num):
+            low = mid + 1
+        elif guess > int(num):
+            big = mid - 1
+    return None
+answer = input('LBWNB')
+chazhao(answer)