auto save

Untitled-1.py

+num_list = [1,3,6,5,9,13,54]
+num = 54
+low = 0
+high = len(num_list)-1
+
+while low<=high:
+    mid = (low+high)//2
+    guess = num_list[mid]
+    if guess == num:
+        print("找到了", mid)
+        break
+    elif guess < num:
+        low = mid+1
+    elif guess > num:
+        high = mid - 1
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