摘要：
关于矩形的单调栈处理，这是这类题目第三次见到了，每次都只是少许变化。 wa了很多发，模拟的时候还是应该尽量小心。 cpp include include include include include include include include include include include / 阅读全文
摘要：
数位dp。 这次是针对&和^的，所以数位变成了二进制位数。针对二进制从高到低位进行搜索即可。 cpp include include include include include include include include include include include // include 阅读全文