Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive.
Example 1:
Input: [5,7] Output: 4
Example 2:
Input: [0,1] Output: 0
class Solution { public int rangeBitwiseAnd(int m, int n) { while (n > m) { n &= n - 1; } return m & n; } }
201. Bitwise AND of Numbers Range
原文：https://www.cnblogs.com/wentiliangkaihua/p/11706615.html