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.
[26, 30]，它们的二进制如下：
左边公共部分决定了区间与的结果， 所以找到它再向左移回来。
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.
[26, 30]，它们的二进制如下：
左边公共部分决定了区间与的结果， 所以找到它再向左移回来。
Question Given a range [m, n] where 0 <= m <= n <= 214748...
Given a range [m, n] where 0 <= m <= n <= 2147483647, ret...
Given a range [m, n] where 0 <= m <= n <= 2147483647, ret...
Given a range [m, n] where 0 <= m <= n <= 2147483647, ret...
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