coffeesweet的博客

You are playing the following Bulls and Cows game with your friend: You write down a number and ask your friend to guess what the number is. Each time your friend makes a guess, you provide a hint t

第一次用Java做leetcode试题，Java的Int类型为32位范围为-2147483648——2147483647，而3在32位里最大为1162261467(3的19次方)所以用1162261467去除n取余public class Solution { public boolean isPowerOfThree(int n) { return n>0