线段树小结

本来想写些文字，最后还是觉得线段树标记太灵活了，直接贴点模板算了

http://blog.youkuaiyun.com/xiaomajiyue/archive/2011/03/04/6222924.aspx

http://blog.youkuaiyun.com/xiaomajiyue/archive/2011/03/05/6225871.aspx

http://blog.youkuaiyun.com/xiaomajiyue/archive/2011/02/26/6209275.aspx