save project

my_tree.py

-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
-    guss=num_list[mid]
-    if guss==num:
-        print("找到了")
-        print(mid)
-        break
-    elif guss<num:
-        low=mid+1
-    else:
-        high=mid-1
+import random
+
+alist=[]
+for i in range(1,101):
+    alist.append(i)
+num=random.choice(alist)
+
+def bbi(alist,num):
+    low=0                                                   #851216
+    high=len(num_list)-1
+
+    while low<=high:
+        mid=(low+high)//2
+        guss=num_list[mid]
+        if guss==num:
+            print("找到了")
+            print(mid)
+            break
+        elif guss<num:
+            low=mid+1
+        else:
+            high=mid-1