278. First Bad Version
Solution Code
Python
# The isBadVersion API is already defined for you. # @param version, an integer # @return an integer # def isBadVersion(version): classSolution:deffirstBadVersion(self,n):""" :type n: int :rtype: int """left_version=1right_version=nwhileleft_version<right_version:mid_version=(left_version+right_version)//2ifisBadVersion(mid_version):right_version=mid_versionelse:left_version=mid_version+1returnleft_version