list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
32840 Ada and Digits   15 182 41.20
20
18
5295 Adjacent Bit Counts   86 3776 63.98
14
18
3763 George   15 528 52.53
19
18
24999 1807   10 529 38.42
15
18
32947 Ada and Trees   18 200 33.45
14
18
5 The Next Palindrome   452 20709 10.82
25
18
24689 Fibo and non fibo   10 317 32.65
18
18
32899 Mean of array   20 238 34.49
15
18
8 Complete the Sequence!   32 4522 36.74
16
18
63 Square Brackets   92 3892 56.76
14
18
7870 Invisible point   17 1671 42.96
4
18
6256 Inversion Count   534 18105 32.03
16
18
22776 Balika Vadhu and Alok Nath   61 1203 33.53
14
18
3693 Maximum Sum   59 6628 42.45
19
18
3861 Laser Phones   31 1420 28.89
20
18
364 Pocket Money   53 2248 38.59
15
18
1841 Prime Path   338 10594 57.99
19
18
4201 Coder Ratings   26 1397 35.83
15
18
247 Chocolate   74 5965 43.30
10
18
10395 Sum of divisors!   25 2384 27.07
16
18
50 Invitation Cards   29 1783 43.12
16
18
10620 KNJIGE   28 1450 44.45
5
18
6691 Picking Up Chicks   29 2262 32.15
11
18
8002 Horrible Queries   399 11162 29.81
19
18
6219 Edit distance   306 13254 33.14
12
18
1435 Vertex Cover   129 4159 34.36
15
18
1029 Matrix Summation   53 3561 20.15
15
18
181 Scuba diver   99 3911 26.08
18
18
7299 Multiples of 3   121 3782 23.63
20
17
10 Complicated Expressions   11 1581 31.63
17
17
12 The Game of Master-Mind   1 794 44.14
17
17
26 Build the Fence   37 2268 28.14
22
17
36 Secret Code   6 553 35.34
17
17
37 The Proper Key   1 143 13.99
17
17
44 Substitution Cipher   3 341 13.83
17
17
70 Relations   2 254 28.80
9
17
73 Bacterial   1 76 18.66
50
17
77 New bricks disorder   1 290 37.79
17
17
83 Bundling   1 57 34.04
17
17
89 Hang or not to hang   1 66 15.60
17
17
99 Bus   188 22.24
34
17
107 Calendar of the Maya   5 137 44.42
21
17
108 Decoding Morse Sequences   7 973 25.04
24
17
119 Servers   116 19.59
17
17
121 Timetable   63 16.42
17
17
123 Paying in Byteland   2 479 46.72
6
17
132 Help R2-D2!   13 771 29.70
19
17
136 Transformation   83 32.18
17
17
139 The Long and Narrow Maze   1 211 20.15
17
17
140 The Loner   160 21.49
34
17

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