| 
          
         | 
        2301 | 
                
              2301
  3306. 树
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2302 | 
                
              2302
  3307. 雨天的尾巴
         | 
        1 / 1 | 
        10 | 
      
      
        | 
          
         | 
        2303 | 
                
              2303
  3308. 九月的咖啡店
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2304 | 
                
              2304
  3309. DZY Loves Math
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2305 | 
                
              2305
  3310. [Usaco2013 Nov]Empty Stalls
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2306 | 
                
              2306
  3311. [Usaco2013 Nov]Line of Sight
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2307 | 
                
              2307
  3312. [Usaco2013 Nov]No Change
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2308 | 
                
              2308
  3313. [Usaco2013 Nov]Farmer John has no Large Brown Cow
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2309 | 
                
              2309
  3314. [Usaco2013 Nov]Crowded Cows
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2310 | 
                
              2310
  3315. [Usaco2013 Nov]Pogo-Cow
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2311 | 
                
              2311
  3316. JC loves Mkk
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2312 | 
                
              2312
  3317. [Swerc2008]First Knight
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2313 | 
                
              2313
  3318. 树
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2314 | 
                
              2314
  3319. 黑白树
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2315 | 
                
              2315
  3320. Seq
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2316 | 
                
              2316
  3321. 生成树Stcnt
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2317 | 
                
              2317
  3322. [Scoi2013]摩托车交易
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2318 | 
                
              2318
  3323. [Scoi2013]多项式的运算
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2319 | 
                
              2319
  3324. [Scoi2013]火柴棍数字
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2320 | 
                
              2320
  3325. [Scoi2013]密码
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2321 | 
                
              2321
  3326. [Scoi2013]数数
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2322 | 
                
              2322
  3327. [Scoi2013]泡泡鱼
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2323 | 
                
              2323
  3328. PYXFIB
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2324 | 
                
              2324
  3329. Xorequ
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2325 | 
                
              2325
  3330. [BeiJing2013]分数
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2326 | 
                
              2326
  3331. [BeiJing2013]压力
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2327 | 
                
              2327
  3332. 旧试题
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2328 | 
                
              2328
  3333. 排队计划
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2329 | 
                
              2329
  3334. Spoj336  EOPERA
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2330 | 
                
              2330
  3335. uva11163 Jaguar King
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2331 | 
                
              2331
  3336. Uva10572 Black and White
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2332 | 
                
              2332
  3337. ORZJRY I
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2333 | 
                
              2333
  3338. Zju1505 Solitaire
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2334 | 
                
              2334
  3339. Rmq Problem
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2335 | 
                
              2335
  3340. [Ceoi2013]Tram
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2336 | 
                
              2336
  3341. [Ceoi2013]adriatic
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2337 | 
                
              2337
  3342. [Ceoi2013]board
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2338 | 
                
              2338
  3343. 教主的魔法
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2339 | 
                
              2339
  3344. Uva11006 Wheel Good
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2340 | 
                
              2340
  3345. Pku2914 Minimum Cut
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2341 | 
                
              2341
  3346. Ural1811 Dual Sim Phone
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2342 | 
                
              2342
  3347. Srm524 Axonometric Projection
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2343 | 
                
              2343
  3348. TCO11 Semifinal Orthogonal Anagram
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2344 | 
                
              2344
  3349. 矩阵填数
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2345 | 
                
              2345
  3350. 相似回文串
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2346 | 
                
              2346
  3351. [ioi2009]Regions
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2347 | 
                
              2347
  3352. [ioi2009]旅行商
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2348 | 
                
              2348
  3353. [ioi2009]Archery
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2349 | 
                
              2349
  3354. [ioi2009]Hiring
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2350 | 
                
              2350
  3355. [Usaco2004 Jan]有序奶牛
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2351 | 
                
              2351
  3356. [Usaco2004 Jan]禁闭围栏
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2352 | 
                
              2352
  3357. [Usaco2004]等差数列
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2353 | 
                
              2353
  3358. [Usaco2004 Jan]洪水
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2354 | 
                
              2354
  3359. [Usaco2004 Jan]矩形
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2355 | 
                
              2355
  3360. [Usaco2004 Jan]算二十四
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2356 | 
                
              2356
  3361. [Usaco2004 Jan]培根距离
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2357 | 
                
              2357
  3362. [Usaco2004 Feb]Navigation Nightmare 导航噩梦
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2358 | 
                
              2358
  3363. [Usaco2004 Feb]Cow Marathon 奶牛马拉松
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2359 | 
                
              2359
  3364. [Usaco2004 Feb]Distance Queries 距离咨询
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2360 | 
                
              2360
  3365. [Usaco2004 Feb]Distance Statistics 路程统计
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2361 | 
                
              2361
  3366. [Usaco2004 Feb]Breeding 奶牛饲育
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2362 | 
                
              2362
  3367. [Usaco2004 Feb]The Big Game 球赛
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2363 | 
                
              2363
  3368. [Usaco2004]Farmer John's View 约翰看山
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2364 | 
                
              2364
  3369. [Usaco2004 Feb]Pesky Parentheses 烦人括号
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2365 | 
                
              2365
  3370. [Usaco2004 Mar]Moo University - Team Tryouts 体操队
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2366 | 
                
              2366
  3371. [Usaco2004 Mar]Moo University - Emergency Pizza Order 定制比萨饼
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2367 | 
                
              2367
  3372. [Usaco2004 Feb]Moo University -- Financial Aid 财政补助
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2368 | 
                
              2368
  3373. [Usaco2004 Mar]Lying Livestock 说谎的牲畜
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2369 | 
                
              2369
  3374. [Usaco2004 Mar]Special Serial Numbers 特殊编号
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2370 | 
                
              2370
  3375. [Usaco2004 Mar]Paranoid Cows 发疯的奶牛
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2371 | 
                
              2371
  3376. [Usaco2004 Open]Cube Stacking 方块游戏
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2372 | 
                
              2372
  3377. [Usaco2004 Open]The Cow Lineup 奶牛序列
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2373 | 
                
              2373
  3378. [Usaco2004 Open]MooFest 狂欢节
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2374 | 
                
              2374
  3379. [Usaco2004 Open]Turning in Homework 交作业
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2375 | 
                
              2375
  3380. [Usaco2004 Open]Cave Cows 1 洞穴里的牛之一
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2376 | 
                
              2376
  3381. [Usaco2004 Open]Cave Cows 2 洞穴里的牛之二
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2377 | 
                
              2377
  3382. [Usaco2004 Open]Cave Cows 3 洞穴里的牛之三
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2378 | 
                
              2378
  3383. [Usaco2004 Open]Cave Cows 4 洞穴里的牛之四
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2379 | 
                
              2379
  3384. [Usaco2004 Nov]Apple Catching 接苹果
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2380 | 
                
              2380
  3385. [Usaco2004 Nov]Lake Counting 数池塘
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2381 | 
                
              2381
  3386. [Usaco2004 Nov]Til the Cows Come Home 带奶牛回家
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2382 | 
                
              2382
  3387. [Usaco2004 Dec]Fence Obstacle Course栅栏行动
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2383 | 
                
              2383
  3388. [Usaco2004 Dec]Cow Ski Area雪场缆车
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2384 | 
                
              2384
  3389. [Usaco2004 Dec]Cleaning Shifts安排值班
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2385 | 
                
              2385
  3390. [Usaco2004 Dec]Bad Cowtractors牛的报复
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2386 | 
                
              2386
  3391. [Usaco2004 Dec]Tree Cutting网络破坏
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2387 | 
                
              2387
  3392. [Usaco2005 Feb]Part Acquisition 交易
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2388 | 
                
              2388
  3393. [Usaco2009 Jan]Laserphones  激光通讯
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2389 | 
                
              2389
  3394. [Usaco2009 Jan]Best Spot 最佳牧场
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2390 | 
                
              2390
  3395. [Usaco2006 Feb]Cellphones 手机
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2391 | 
                
              2391
  3396. [Usaco2009 Jan]Total flow 水流
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2392 | 
                
              2392
  3397. [Usaco2009 Feb]Surround the Islands 环岛篱笆
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2393 | 
                
              2393
  3398. [Usaco2009 Feb]Bullcow  牡牛和牝牛
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2394 | 
                
              2394
  3399. [Usaco2009 Mar]Sand Castle城堡
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2395 | 
                
              2395
  3400. [Usaco2009 Mar]Cow Frisbee Team 奶牛沙盘队
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2396 | 
                
              2396
  3401. [Usaco2009 Mar]Look Up 仰望
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2397 | 
                
              2397
  3402. [Usaco2009 Open]Hide and Seek 捉迷藏
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2398 | 
                
              2398
  3403. [Usaco2009 Open]Cow Line 直线上的牛
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2399 | 
                
              2399
  3404. [Usaco2009 Open]Cow Digit Game又见数字游戏
         | 
        0 / 0 | 
        (无) | 
      
      
        | 
          
         | 
        2400 | 
                
              2400
  3405. [Usaco2009 Open]Grazing2 移动牛棚
         | 
        0 / 0 | 
        (无) |