|
|
500 |
500
打印文章
|
0 / 0 |
(无) |
|
|
501 |
501
锯木厂选址
|
0 / 0 |
(无) |
|
|
502 |
502
序列的第 k 个数
|
16 / 32 |
5 |
|
|
503 |
503
越狱
|
3 / 7 |
10 |
|
|
504 |
504
轻拍牛头
|
0 / 0 |
(无) |
|
|
505 |
505
Goldbach's Conjecture
|
1 / 1 |
10 |
|
|
506 |
506
Sherlock and His Girlfriend
|
16 / 52 |
6 |
|
|
507 |
507
樱花
|
0 / 0 |
(无) |
|
|
508 |
508
X-factor Chain
|
0 / 5 |
10 |
|
|
509 |
509
聪明的燕姿
|
0 / 0 |
(无) |
|
|
510 |
510
SuperGCD
|
1 / 5 |
10 |
|
|
511 |
511
Sumdiv
|
1 / 1 |
10 |
|
|
512 |
512
曹冲养猪
|
12 / 20 |
6 |
|
|
513 |
513
Strange Way to Express Integers
|
0 / 0 |
(无) |
|
|
514 |
514
计算器
|
0 / 4 |
10 |
|
|
515 |
515
五指山
|
0 / 3 |
10 |
|
|
516 |
516
Biorhythms
|
1 / 5 |
10 |
|
|
517 |
517
C Looooops
|
0 / 0 |
(无) |
|
|
518 |
518
矩阵 A×B
|
133 / 264 |
3 |
|
|
519 |
519
Fibonacci 第 n 项
|
3 / 9 |
10 |
|
|
520 |
520
Fibonacci 前 n 项和
|
0 / 1 |
10 |
|
|
521 |
521
佳佳的 Fibonacci
|
1 / 2 |
10 |
|
|
522 |
522
GT 考试
|
1 / 1 |
10 |
|
|
523 |
523
迷路
|
0 / 0 |
(无) |
|
|
524 |
524
组合
|
0 / 19 |
10 |
|
|
525 |
525
牡牛和牝牛
|
0 / 0 |
(无) |
|
|
526 |
526
方程的解
|
0 / 0 |
(无) |
|
|
527 |
527
车的放置
|
1 / 1 |
10 |
|
|
528 |
528
数三角形
|
0 / 0 |
(无) |
|
|
529 |
529
Combination
|
4 / 4 |
10 |
|
|
530 |
530
序列统计
|
1 / 1 |
10 |
|
|
531 |
531
超能粒子炮・改
|
1 / 1 |
10 |
|
|
532 |
532
礼物
|
0 / 0 |
(无) |
|
|
533 |
533
网格
|
0 / 0 |
(无) |
|
|
534 |
534
有趣的数列
|
0 / 0 |
(无) |
|
|
535 |
535
树屋阶梯
|
1 / 2 |
10 |
|
|
536 |
536
取石子游戏 1
|
9 / 31 |
7 |
|
|
537 |
537
取石子游戏 2
|
8 / 12 |
8 |
|
|
538 |
538
移棋子游戏
|
4 / 6 |
10 |
|
|
539 |
539
取石子游戏
|
5 / 11 |
9 |
|
|
540 |
540
巧克力棒
|
5 / 5 |
10 |
|
|
541 |
541
取石子
|
6 / 12 |
9 |
|
|
542 |
542
S-Nim
|
0 / 1 |
10 |
|
|
543 |
543
取石子游戏
|
0 / 2 |
10 |
|
|
545 |
545
贪婪的送礼者Greedy Gift Givers
|
10 / 21 |
6 |
|
|
546 |
546
黑色星期五Friday the Thirteenth
|
8 / 10 |
9 |
|
|
547 |
547
坏掉的项链Broken Necklace
|
25 / 64 |
5 |
|
|
548 |
548
挤牛奶Milking Cows
|
4 / 5 |
10 |
|
|
549 |
549
方块转换 Transformations
|
3 / 3 |
10 |
|
|
550 |
550
命名那个数字 Name That Number
|
0 / 30 |
10 |
|
|
551 |
551
回文平方数 Palindromic Squares
|
8 / 14 |
8 |
|
|
552 |
552
双重回文数 Dual Palindromes
|
0 / 0 |
(无) |
|
|
553 |
553
混合牛奶 Mixing Milk
|
13 / 142 |
9 |
|
|
554 |
554
修理牛棚 Barn Repair
|
42 / 93 |
4 |
|
|
555 |
555
最长的回文 Calf Flac
|
1 / 2 |
10 |
|
|
556 |
556
牛式 Prime Cryptarithm
|
5 / 5 |
10 |
|
|
557 |
557
时钟 The Clocks
|
0 / 0 |
(无) |
|
|
558 |
558
铺放矩形块 Packing Rectangles
|
0 / 0 |
(无) |
|
|
559 |
559
等差数列 Arithmetic Progressions
|
2 / 6 |
10 |
|
|
560 |
560
母亲的牛奶 Mother's Milk
|
2 / 2 |
10 |
|
|
561 |
561
数字三角形 Number Triangles
|
190 / 543 |
5 |
|
|
562 |
562
回文质数 Prime Palindromes
|
10 / 27 |
6 |
|
|
563 |
563
特殊的质数肋骨 Superprime Rib
|
3 / 4 |
10 |
|
|
564 |
564
跳棋的挑战 Checker Challenge
|
7 / 26 |
7 |
|
|
565 |
565
城堡 The Castle
|
6 / 24 |
8 |
|
|
566 |
566
顺序的分数 Ordered Fractions
|
1 / 1 |
10 |
|
|
567 |
567
三值的排序 Sorting a Three-Valued Sequence
|
3 / 4 |
10 |
|
|
568 |
568
健康的荷斯坦奶牛 Healthy Holsteins
|
11 / 14 |
7 |
|
|
569 |
569
海明码 Hamming Codes
|
59 / 139 |
4 |
|
|
570 |
570
序言页码 Preface Numbering
|
1 / 1 |
10 |
|
|
571 |
571
集合 Subset Sums
|
3 / 3 |
10 |
|
|
572 |
572
循环数 Runaround Numbers
|
2 / 5 |
10 |
|
|
573 |
573
派对灯 Party Lamps
|
1 / 2 |
10 |
|
|
574 |
574
最长前缀 Longest Prefix
|
2 / 6 |
10 |
|
|
575 |
575
奶牛家谱 Cow Pedigrees
|
9 / 10 |
9 |
|
|
576 |
576
和为零 Zero Sum
|
4 / 4 |
10 |
|
|
577 |
577
货币系统 Money Systems
|
46 / 142 |
6 |
|
|
578 |
578
控制公司 Controlling Companies
|
1 / 2 |
10 |
|
|
579 |
579
两只塔姆沃斯牛 The Tamworth Two
|
1 / 2 |
10 |
|
|
580 |
580
穿越栅栏 Overfencing
|
1 / 3 |
10 |
|
|
581 |
581
回家 Bessie Come Home
|
1 / 1 |
10 |
|
|
582 |
582
牛的旅行 Cow Tours
|
2 / 2 |
10 |
|
|
583 |
583
分数化小数 Fractions to Decimals
|
1 / 1 |
10 |
|
|
584 |
584
最短网络Agri-Net
|
18 / 29 |
3 |
|
|
585 |
585
总分 Score Inflation
|
37 / 81 |
4 |
|
|
586 |
586
丑数 Humble Numbers
|
2 / 4 |
10 |
|
|
587 |
587
形成的区域 Shaping Regions
|
0 / 0 |
(无) |
|
|
588 |
588
联系 Contact
|
0 / 1 |
10 |
|
|
589 |
589
邮票 Stamps
|
15 / 55 |
7 |
|
|
590 |
590
阶乘 Factorials
|
1 / 11 |
10 |
|
|
591 |
591
串 Stringsobits01
|
0 / 0 |
(无) |
|
|
592 |
592
纺车的轮子 Spinning Wheels
|
2 / 2 |
10 |
|
|
593 |
593
饲料调配 Feed Ratios
|
0 / 0 |
(无) |
|
|
594 |
594
魔板 Magic Squares
|
1 / 1 |
10 |
|
|
595 |
595
香甜的黄油 Sweet Butter
|
4 / 25 |
8 |
|
|
596 |
596
骑马修栅栏 Riding the Fences
|
21 / 159 |
8 |
|
|
597 |
597
商店购物 Shopping Offers
|
0 / 0 |
(无) |
|
|
598 |
598
亚瑟王的宫殿 Camelot
|
0 / 0 |
(无) |
|
|
600 |
600
游戏 A Game
|
0 / 1 |
10 |
|
|
601 |
601
闭合的栅栏 Closed Fences
|
0 / 1 |
10 |