This gives an O(n lg n) solution (to "scan from left to right", we need to sort the segments). It was a bit of a winding logical path to get here, so the final solution may not be quite clear. Take a look at Travis Hance's solution, which presents the idea quite elegantly: ...
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Sample Input 6 2 2 R 6 L 1 R 8 L 1 R 2 R Sample Output 6 下面的方法用了 map 和 区间表示法 http://www.cnblogs.com/zquzjx/p/8321466.html(区间表示法看这里) 但是不同于 题解https://www.luogu.org/problemnew/solution/P2205扫描线的方法可以得到整段覆盖次数 (蠢哭)存在一种特殊情况 ...
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