auto save

diy2.py

-username = "python"
-userpassword = "123456"
-while True:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
-    if name == username and password == userpassword:
-        print("登录成功!")
-    print("用户名和密码错误!请重新输入")
-print("欢迎来到贝尔编程!")
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+bingo_num = 2
+num_list = [1,3,5,8,11,15,17,18,20,21]
+low = 0
+high = len(num_list)-1
+
+
+
+while low <= high:
+    mid = (low + high) // 2
+    guess = num_list[mid]
+    if guess == bingo_num:
+        print("找到,在",mid)
+        break
+    elif guess< bingo_num:
+        low = mid+1
+    elif guess< bingo_num:
+        high = mid-1
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