作者：刘禹博         更新时间：2024-09-28 11:10          浏览：169次         点赞：0次          热度：20

def f(s,x): low=0 high=len(s)-1 while low <= high: mid=(low+high)//2 zhong=s[mid] if zhong < x: low=mid+1 elif zhong > x: high=mid-1 else: return mid return None a=[1,3,6,9,12,68,77,89,100] print(f(a,77))