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不知道为什么有人说必须开4倍大小的空间，贡献re和wa之后发现。。。

Posted by 2006140020 at 2012-01-04 22:43:59 on Problem 2777 
测试开到275000是可以ac的。
不过，线段树的节点综述不超过2N-1，所以还是不明白为什么200000不能ac。
可能数据里面说是最大L有100000，但是其实不止。
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