693. Binary Number with Alternating Bits
Given a positive integer, check whether it has alternating bits: namely, if two adjacent bits will always have different values
直接照字面方法解，先轉成二進位字串，再逐一比對是否相異
class Solution {
public boolean hasAlternatingBits(int n) {
char[] binaryCh = Integer.toBinaryString(n).toCharArray();
for(int i=0; i<binaryCh.length-1; i++) {
if(binaryCh[i] == binaryCh[i+1]) return false;
}
return true;
}
}
高手解法
https://discuss.leetcode.com/topic/106356/oneliners-c-java-ruby-python/2