摘要：
Given an integer, write a function to determine if it is a power of two.Analysis: 给出一个整数，判断是否为2的幂方。依次除以2，若某次中余数不为0，则不是二的幂方。Answer： public boolean i... 阅读全文
摘要：
Given two stringssandt, write a function to determine iftis an anagram ofs.For example,s= "anagram",t= "nagaram", return true.s= "rat",t= "car", retur... 阅读全文