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list of classical problems
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ID
NAME
CODE
USERS
ACC %
3385
Yoda Goes Palindromic !
YODA
581
30.44
3393
Knot or Not
NOTOKNOT
6
13.56
3394
Lagrange’s Four-Square Theorem
LAGRANGE
530
45.99
3412
Higgs Boson
SAMER08H
48
18.93
3442
The last digit
LASTDIG
29647
26.91
3464
Clock
CLOCK1
54
36.11
3466
Another Longest Common Subsequence Problem
CS
6
31.58
3543
Matrica
MATRICA
53
39.38
3544
Binary Search Tree
BST
598
20.83
3545
Najkraci
NAJKRACI
183
28.78
3591
Patting Heads
PATHEADS
650
35.26
3723
Snooker
SNOOKER
451
50.14
3749
Subset Sums
SUBSUMS
4083
26.40
3752
JEDNAKOST
JEDNAKOS
596
18.41
3763
George
GEORGE
522
52.29
3791
Street
STREET
666
51.38
3898
Even Palindrome
PALDR
247
10.24
3946
K-th Number
MKTHNUM
5426
34.85
3953
Paid Roads
MMINPAID
252
26.88
3961
Journey with Pigs
MJOURNEY
130
41.30
3962
ELEVATOR II
MELE2
99
42.96
3977
Police Query
POLQUERY
294
17.20
4070
Two Professors
TWOPROF
101
14.34
4103
Extend to Palindrome
EPALIN
2435
29.97
4110
Fast Maximum Flow
FASTFLOW
2885
34.23
4157
Domino
DOMINO2
54
50.42
4164
A conjecture of Paul Erdős
HS08PAUL
2311
44.07
4166
Four colors
HS08FOUR
99
21.79
4168
Square-free integers
SQFREE
682
44.75
4172
Multiplicative digital root
DROOT
73
25.40
4176
A Knightly Pursuit
KPURSUIT
64
28.03
4177
Herding
HERDING
2714
35.23
4179
Temptation Island
TEMPTISL
649
44.88
4182
Candy (Again)
FCANDY
226
18.42
4186
Break a New RSA system
HS08CODE
136
35.61
4188
Amazing equality
HS08EQ
38
13.58
4189
Landing
LANDING
4
3.64
4198
Lego
LEGO
182
25.37
4206
Fast Maximum Matching
MATCHING
1990
29.25
4421
Irreducible polynomials over GF2
GF2
62
17.92
4458
Rainbow
RAINBOW2
34
19.46
4487
Can you answer these queries VI
GSS6
1287
23.06
4523
Binomial Coefficients
UCI2009B
207
41.27
4525
Digger Octaves
UCI2009D
379
35.78
4528
Frog Wrestling
FROGS
66
43.23
4761
Strategy game
HS09GAME
39
54.84
4785
Starship
HS09SHIP
10
28.80
4828
ZSequence
ZSEQ
51
19.33
5163
Tower of Vientiane
VIENTIAN
92
40.20
5182
Double Sorting
PAIRSORT
12
8.88
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