| 
          
         | 
        1470 | 
                
              1470
  BJOI2015 骑士的旅行
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4071 | 
                
              P1486
  [HNOI2009] 有趣的数列
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1488 | 
                
              1488
  [POI2016]Korale
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4077 | 
                
              P1493
  [NOI2007]项链工厂
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4086 | 
                
              P1503
  [NOI2004] 郁闷的出纳员
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1508 | 
                
              1508
  Play with tree
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1525 | 
                
              1525
  Play with sequence
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1543 | 
                
              1543
  permu
         | 
        0 / 15 | 
        10 | 
      
      
        | 
          
         | 
        1551 | 
                
              1551
  isn
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1558 | 
                
              1558
  [IOI2014]wall砖墙
         | 
        2 / 3 | 
        10 | 
      
      
        | 
          
         | 
        1561 | 
                
              1561
  [Usaco2017 Jan]Balanced Photo
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1585 | 
                
              1585
  [POI2011] Lightning Conductor
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1624 | 
                
              1624
  [CQOI2011] 动态逆序对
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1708 | 
                
              1708
  [SDOI2011] 消耗战
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1778 | 
                
              1778
  [Zjoi2017]树状数组
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1801 | 
                
              1801
  [HNOI2014] 道路堵塞
         | 
        1 / 3 | 
        10 | 
      
      
        | 
          
         | 
        1820 | 
                
              1820
  [SCOI2014] 方伯伯的玉米田
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1821 | 
                
              1821
  [SCOI2014] 方伯伯的OJ
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        1850 | 
                
              1850
  [LNOI2014]LCA
         | 
        1 / 1 | 
        10 | 
      
      
        | 
          
         | 
        1855 | 
                
              1855
  [JLOI2014] 松鼠的新家
         | 
        0 / 0 | 
        (无) |