| 
          
         | 
        2401 | 
                
              2401
  3406. [Usaco2009 Oct]Invasion of the Milkweed 乳草的入侵
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2402 | 
                
              2402
  3407. [Usaco2009 Oct]Bessie's Weight Problem 贝茜的体重问题
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2403 | 
                
              2403
  3408. [Usaco2009 Oct]Heat Wave 热浪
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2404 | 
                
              2404
  3409. [Usaco2009 Oct]Barn Echoes 牛棚回声
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2405 | 
                
              2405
  3410. [Usaco2009 Dec]Selfish Grazing 自私的食草者
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2406 | 
                
              2406
  3411. [Usaco2009 Dec]Bobsledding 高山滑雪
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2407 | 
                
              2407
  3412. [Usaco2009 Dec]Music Notes乐谱
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2408 | 
                
              2408
  3413. 匹配
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2409 | 
                
              2409
  3414. Poi2013 Inspector
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2410 | 
                
              2410
  3415. Poi2013 Price List
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2411 | 
                
              2411
  3416. Poi2013 Take-out
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2412 | 
                
              2412
  3417. Poi2013  Tales of seafaring
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2413 | 
                
              2413
  3418. Poi2013  Tapestries
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2414 | 
                
              2414
  3419. Poi2013 Taxis
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2415 | 
                
              2415
  3420. Poi2013 Triumphal arch
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2416 | 
                
              2416
  3421. Poi2013 Walk
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2417 | 
                
              2417
  3422. Amppz2013 The Motorway
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2418 | 
                
              2418
  3423. Amppz2013  The Exam
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2419 | 
                
              2419
  3424. Poi2013 Multidrink
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2420 | 
                
              2420
  3425. Poi2013 Polarization
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2421 | 
                
              2421
  3426. Poi2013 Tower Defense Game
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2422 | 
                
              2422
  3427. Poi2013 Bytecomputer
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2423 | 
                
              2423
  3428. [Usaco2014 Jan]Cow Curling
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2424 | 
                
              2424
  3429. [Usaco2014 Jan]Building a Ski Course
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2425 | 
                
              2425
  3430. [Usaco2014 Jan]Ski Course Rating
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2426 | 
                
              2426
  3431. [Usaco2014 Jan]Bessie Slows Down
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2427 | 
                
              2427
  3432. [Usaco2014 Jan]Cross Country Skiing
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2428 | 
                
              2428
  3433. [Usaco2014 Jan]Recording the Moolympics
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2429 | 
                
              2429
  3434. [Wc2014]时空穿梭
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2430 | 
                
              2430
  3435. [Wc2014]紫荆花之恋
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2431 | 
                
              2431
  3436. 小K的农场
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2432 | 
                
              2432
  3437. 小P的牧场
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2433 | 
                
              2433
  3438. 小M的作物
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2434 | 
                
              2434
  3439. Kpm的MC密码
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2435 | 
                
              2435
  3440. 传球游戏
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2436 | 
                
              2436
  3441. 乌鸦喝水
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2437 | 
                
              2437
  3442. 学习小组
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2438 | 
                
              2438
  3443. 装备合成
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2439 | 
                
              2439
  3444. 最后的晚餐
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2440 | 
                
              2440
  3445. [Usaco2014 Feb] Roadblock
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2441 | 
                
              2441
  3446. [Usaco2014 Feb]Cow Decathlon
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2442 | 
                
              2442
  3447. [Usaco2014 Feb]Airplane Boarding
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2443 | 
                
              2443
  3448. [Usaco2014 Feb]Auto-complete
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2444 | 
                
              2444
  3449. [Usaco2014 Feb]Secret Code
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2445 | 
                
              2445
  3450. Tyvj1952 Easy
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2446 | 
                
              2446
  3451. Tyvj1953 Normal
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2447 | 
                
              2447
  3452. Tyvj1955 Lunatic
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2448 | 
                
              2448
  3453. tyvj 1858 XLkxc
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2449 | 
                
              2449
  3454. 家族
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2450 | 
                
              2450
  3455. 供电网络
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2451 | 
                
              2451
  3456. 城市规划
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2452 | 
                
              2452
  3457. Ring
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2453 | 
                
              2453
  3458. Luck
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2454 | 
                
              2454
  3459. Bomb
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2455 | 
                
              2455
  3460.  Jc的宿舍
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2456 | 
                
              2456
  3461. Jry的时间表
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2457 | 
                
              2457
  3462. DZY Loves Math II
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2458 | 
                
              2458
  3463. [COCI2012] Inspector
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2459 | 
                
              2459
  3464. 动态仙人掌 I
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2460 | 
                
              2460
  3465. 动态仙人掌 II
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2461 | 
                
              2461
  3466. 动态仙人掌 III
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2462 | 
                
              2462
  3467. Crash和陶陶的游戏
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2463 | 
                
              2463
  3468. 滑雪
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2464 | 
                
              2464
  3469. ADERA
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2465 | 
                
              2465
  3470. Freda’s Walk
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2466 | 
                
              2466
  3471. Dragon Scroll
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2467 | 
                
              2467
  3472. 穿越
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2468 | 
                
              2468
  3473. 字符串
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2469 | 
                
              2469
  3474. ZZB的数学作业
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2470 | 
                
              2470
  3475. 除草
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2471 | 
                
              2471
  3476. [Usaco2014 Mar]The Lazy Cow
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2472 | 
                
              2472
  3477. [Usaco2014 Mar]Sabotage
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2473 | 
                
              2473
  3478. [Usaco2014 Mar]Counting Friends
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2474 | 
                
              2474
  3479. [Usaco2014 Mar]Watering the Fields
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2475 | 
                
              2475
  3480. [Usaco2014 Mar]Mooo
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2476 | 
                
              2476
  3481.  DZY Loves Math III
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2477 | 
                
              2477
  3482. [COCI2013]hiperprostor
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2478 | 
                
              2478
  3483.  SGU505 Prefixes and suffixes(询问在线版)
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2479 | 
                
              2479
  3484. [Baltic2012]brackets
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2480 | 
                
              2480
  3485. [Baltic2012]peaks
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2481 | 
                
              2481
  3486. [Baltic2012]mobile
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2482 | 
                
              2482
  3487. [Poi2013]Maze
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2483 | 
                
              2483
  3488. [ONTAK2010]Highways
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2484 | 
                
              2484
  3489.  A simple rmq problem
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2485 | 
                
              2485
  3490. Pa2011 Laser Pool
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2486 | 
                
              2486
  3491. PA2007 Subsets
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2487 | 
                
              2487
  3492. PA2012 Binary Dodgeball
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2488 | 
                
              2488
  3493. PA2010 Termites
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2489 | 
                
              2489
  3494. PA2010 Planning the Roadworks
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2490 | 
                
              2490
  3495. PA2010 Riddle
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2491 | 
                
              2491
  3496. PA2010 The Goat
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2492 | 
                
              2492
  3497. Pa2009 Circular Game
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2493 | 
                
              2493
  3498. PA2009 Cakes
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2494 | 
                
              2494
  3499. PA2009 Quasi-template
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2495 | 
                
              2495
  3500. PA2008 Cliquers
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2496 | 
                
              2496
  3501. PA2008 Cliquers Strike Back
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2497 | 
                
              2497
  3502. PA2012 Tanie linie
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2498 | 
                
              2498
  3503. [Cqoi2014]和谐矩阵
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2499 | 
                
              2499
   [CQOI2014] 危桥
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2500 | 
                
              2500
  3505. [Cqoi2014]数三角形
         | 
        0 / 0 | 
        (无) |