| 
          
         | 
        3501 | 
                
              3501
  4506. [Usaco2016 Jan]Fort Moo
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3502 | 
                
              3502
  4507. [Usaco2016 Jan]Mowing the Field
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3503 | 
                
              3503
  4508. [Usaco2016 Jan]Light out
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3504 | 
                
              3504
  4509. [Usaco2016 Jan]Angry Cows
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3505 | 
                
              3505
  4510. [Usaco2016 Jan]Radio Contact
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3506 | 
                
              3506
  4511. [Usaco2016 Jan]Subsequences Summing to Sevens
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3507 | 
                
              3507
  4512. [Usaco2016 Jan] Build Gates
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3508 | 
                
              3508
  4513. [Sdoi2016]储能表
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3509 | 
                
              3509
  4514. [Sdoi2016]数字配对
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3510 | 
                
              3510
  4515. [Sdoi2016]游戏
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3511 | 
                
              3511
  4516. [Sdoi2016]生成魔咒
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3512 | 
                
              3512
  4517. [Sdoi2016]排列计数
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3513 | 
                
              3513
  4518. [Sdoi2016]征途
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3514 | 
                
              3514
  4519. [Cqoi2016]不同的最小割
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3515 | 
                
              3515
  [CQOI2016] K 远点对
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3516 | 
                
              3516
  [CQOI2016] 手机号码
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3517 | 
                
              3517
  4522. [Cqoi2016]密钥破解
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3518 | 
                
              3518
  4523. [Cqoi2016]路由表
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3519 | 
                
              3519
  4524. [Cqoi2016]伪光滑数
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3520 | 
                
              3520
  4525. [Usaco2016 Jan]Angry Cows
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3521 | 
                
              3521
  4526. Hamming Triples
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3522 | 
                
              3522
  4527. K-D-Sequence
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3523 | 
                
              3523
  4528. LotteryTree
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3524 | 
                
              3524
  4529. [Bjoi2014]想法
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3525 | 
                
              3525
  4530. [Bjoi2014]大融合
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3526 | 
                
              3526
  4531. [Bjoi2014]路径
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3527 | 
                
              3527
  4532. [BeiJing2014 WinterCamp] 珠链
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3528 | 
                
              3528
  4533. [BeiJing2014 WinterCamp] 数据
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3529 | 
                
              3529
  4534. 基础排序算法练习题
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3530 | 
                
              3530
  4535. [Ontak2013]Kapita加强版
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3531 | 
                
              3531
  4536. 最大异或和II
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3532 | 
                
              3532
  4537. [Hnoi2016]最小公倍数
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3533 | 
                
              3533
  4538. [Hnoi2016]网络
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3534 | 
                
              3534
  4539. [Hnoi2016]树
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3535 | 
                
              3535
  4540. [Hnoi2016]序列
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3536 | 
                
              3536
  4541. [Hnoi2016]矿区
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3537 | 
                
              3537
  4542. [Hnoi2016]大数
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3538 | 
                
              3538
  4543. [POI2014]Hotel加强版
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3539 | 
                
              3539
  4544. 椭圆上的整点
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3540 | 
                
              3540
  4545. DQS的trie
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3541 | 
                
              3541
  4546. codechef XRQRS
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3542 | 
                
              3542
  4547. Hdu5171 小奇的集合
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3543 | 
                
              3543
  4548. 小奇的糖果
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3544 | 
                
              3544
  4549. [Ctsc2016]萨菲克斯.阿瑞
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3545 | 
                
              3545
  4550. 小奇的博弈
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3546 | 
                
              3546
  4551. [Tjoi2016&Heoi2016]树
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3547 | 
                
              3547
  [HEOI2016/TJOI2016] [线段树分裂]排序
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3548 | 
                
              3548
  4553. [Tjoi2016&Heoi2016]序列
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3549 | 
                
              3549
  4554. [Tjoi2016&Heoi2016]游戏
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3550 | 
                
              3550
  4555. [Tjoi2016&Heoi2016]求和
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3551 | 
                
              3551
  4556. [Tjoi2016&Heoi2016]字符串
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3552 | 
                
              3552
  4557. [JLoi2016]侦察守卫
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3553 | 
                
              3553
  4558. [JLoi2016]方
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3554 | 
                
              3554
  4559. [JLoi2016]成绩比较
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3555 | 
                
              3555
  4560. [JLoi2016]字符串覆盖
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3556 | 
                
              3556
  4561. [JLoi2016]圆的异或并
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3557 | 
                
              3557
  4562. [Haoi2016]食物链
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3558 | 
                
              3558
  4563. [Haoi2016]放棋子
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3559 | 
                
              3559
  4564. [Haoi2016]地图
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3560 | 
                
              3560
  4565. [Haoi2016]字符合并
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3561 | 
                
              3561
  [HAOI2016] 找相同字符
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3562 | 
                
              3562
  4567.  [SCOI2016] 背单词
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3563 | 
                
              3563
  4568. [Scoi2016]幸运数字
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3564 | 
                
              3564
  4569. [Scoi2016]萌萌哒
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3565 | 
                
              3565
  4570. [Scoi2016]妖怪
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3566 | 
                
              3566
  4571. [Scoi2016]美味
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3567 | 
                
              3567
  4572. [Scoi2016]围棋
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3568 | 
                
              3568
  4573. [Zjoi2016]大森林
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3569 | 
                
              3569
  4574. [Zjoi2016]线段树
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3570 | 
                
              3570
  4575. [Zjoi2016]电阻网络
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3571 | 
                
              3571
  4576. [Usaco2016 Open]262144
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3572 | 
                
              3572
  4577. [Usaco2016 Open]Bull in a China Shop
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3573 | 
                
              3573
  4578. [Usaco2016 OPen]Splitting the Field
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3574 | 
                
              3574
  4579. [Usaco2016 Open]Closing the Farm
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3575 | 
                
              3575
  4580. [Usaco2016 Open]248
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3576 | 
                
              3576
  4581. [Usaco2016 Open]Field Reduction
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3577 | 
                
              3577
  4582. [Usaco2016 Open]Diamond Collector
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3578 | 
                
              3578
  4583. 购物
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3579 | 
                
              3579
  4584. [Apio2016]赛艇
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3580 | 
                
              3580
  4585. [Apio2016]烟火表演
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3581 | 
                
              3581
  4586. [Usaco2016 Open]Landscaping
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3582 | 
                
              3582
  4587. 推箱子
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3583 | 
                
              3583
  4588. CoinChange
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3584 | 
                
              3584
  4589. Hard Nim
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3585 | 
                
              3585
  4590. [SHOI2015]自动刷题机
         | 
        1 / 3 | 
        10 | 
      
      
        | 
          
         | 
        3586 | 
                
              3586
  4591. [Shoi2015]超能粒子炮·改
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3587 | 
                
              3587
  4592. [Shoi2015]脑洞治疗仪
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3588 | 
                
              3588
  4593. [Shoi2015]聚变反应炉
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3589 | 
                
              3589
  4594. [Shoi2015]零件组装机
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3590 | 
                
              3590
  4595. [Shoi2015]激光发生器
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3591 | 
                
              3591
  4596. [Shoi2016]黑暗前的幻想乡
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3592 | 
                
              3592
  4597. [Shoi2016]随机序列
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3593 | 
                
              3593
  4598.[SDOI2016] 模式字符串
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3594 | 
                
              3594
  4599. [Sdoi2016]墙上的句子
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3595 | 
                
              3595
  4600. [Sdoi2016]硬币游戏
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3596 | 
                
              3596
  4601. [Sdoi2016]探险路线
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3597 | 
                
              3597
  4602. [Sdoi2016]齿轮
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3598 | 
                
              3598
  4603. [Sdoi2016]平凡的骰子
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3599 | 
                
              3599
  4604. The kth maximum number
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        3600 | 
                
              3600
  4605. 崂山白花蛇草水
         | 
        0 / 0 | 
        (无) |