save project

diy2.py

-i=3
-username = "python"
-userpassword = "123456"
-while True:
-    if i>0:
-        name = input("请输入用户名:")
-        password = input("请输入密码:")
-        i-=1
-        if name == username and password == userpassword:
-            print("登录成功!")
-            break
-        elif username!=name:
-            print("用户名!请重新输入")
-            print("温馨提是:你还有"+str(i)+"机会")
-            continue
-        else:
-            print("密码错误!请重新输入")
-            print("温馨提是:你还有"+str(i)+"机会")
-    else:
-        print("你的用户已被锁定！")
-        exit()
-        
-print("欢迎来到贝尔编程!")
-
+a=[1,2,3,4,5,6,7,8,9,0]
+def h(n):
+    l=0
+    r=len(a)
+    while l<=r:
+        mid=(l+r)//2
+        if mid==n:
+            print(1)
+        if mid<n:
+            l=mid+1
+        else :
+            r=mid-1
+h(10)
+h(3)