| 
          
         | 
        4344 | 
                
              IOI2001lxA
  Binary codes (a back-up task)
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4345 | 
                
              IOI2001lxB
  Boxes (a demo task)
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4346 | 
                
              IOI2001lxC
  Break (a demo task)
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4347 | 
                
              IOI2001lxD
  Depot (a competition task)
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4350 | 
                
              IOI2001lxE
  2.5Double crypt (a competition task)
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4352 | 
                
              IOI2001lxF
  Ioiwari (a competition task)
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4366 | 
                
              IOI2001lxG
  Mobiles (a competition task)
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4371 | 
                
              IOI20011C
  Twofive
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4374 | 
                
              IOI20012C
  Depot
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        4279 | 
                
              NOI20011B
  反正切函数的应用
         | 
        0 / 0 | 
        3 | 
      
      
        | 
          
         | 
        4280 | 
                
              NOI20011C
  聪明的打字员
         | 
        0 / 0 | 
        5 | 
      
      
        | 
          
         | 
        4281 | 
                
              NOI20012B
  方程的解数
         | 
        0 / 0 | 
        4 | 
      
      
        | 
          
         | 
        4282 | 
                
              NOI20012C
  陨石的秘密
         | 
        0 / 1 | 
        5 | 
      
      
        | 
          
         | 
        4362 | 
                
              NOIP2001E
  一元三次方程求解
         | 
        20 / 24 | 
        3 | 
      
      
        | 
          
         | 
        246 | 
                
              246
  [NOI2001] 食物链
         | 
        4 / 23 | 
        8 | 
      
      
        | 
          
         | 
        4842 | 
                
              P1029
  [NOIP2001 普及组] 最大公约数和最小公倍数问题
         | 
        4 / 4 | 
        10 | 
      
      
        | 
          
         | 
        2946 | 
                
              P1221
  [HNOI2001] 软件开发
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2951 | 
                
              P1222
  [HNOI2001]产品加工
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2964 | 
                
              P1225
  [HNOI2001] 求正整数
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3990 | 
                
              P1379
  [Baltic2001]Postman
         | 
        0 / 0 | 
        (无) |