Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive.
For example, given the range [5, 7], you should return 4.
Credits:
Special thanks to @amrsaqr for adding this problem and creating all test cases.
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1 public class Solution { 2 public int rangeBitwiseAnd(int m, int n) { 3 int i = 0; 4 while(m != n){ 5 m >>= 1; 6 n >>= 1; 7 i++; 8 } 9 return (m << i); 10 } 11 }
201. Bitwise AND of Numbers Range java solutions
原文：http://www.cnblogs.com/guoguolan/p/5667302.html