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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
17717 Gopu and Counting Bitwise Prime Numbers   9 225 19.81
21
17
15249 Swap (Medium - Level 200)   6 19.81
1442 Strange Food Chain   19 960 19.81
22
25
16549 Query on a tree VI   11 558 19.80
37
27
12958 Another Gift Problem   42 19.75
27379 Unique Code   22 130 19.74
21
21
1473 Lemon Tree in the Moonlight   28 19.74
50
34
2417 Eliminate The Enemies   22 19.74
38365 Asacoco Prescription   2 46 19.71
17
26
8491 Messy Phone List   1 54 19.69
34
17
87 Football   1 67 19.69
17
1
318 Pythagorean Legacy   35 19.69
1
34
25383 New Lottery Game   7 50 19.67
17
15
26368 Power and Mod   4 272 19.65
20
20
59 Bytelandian Information Agency   2 421 19.64
17
23
8930 Party!   3 67 19.63
17
34
10611 Ranges   2 176 19.62
9
9
1787 Run Length Encoding   7 861 19.62
13
3
10707 Count on a tree II   70 3557 19.62
31
30
3866 Finding Palindromes   7 257 19.62
19
23
25180 Gyanbabas Admission Test   3 81 19.61
24
30
15735 Balanced Food   1 10 19.61
12241 Classification from ErdÅ‘s and Selfridge   5 32 19.60
28
28
4309 Circular game   35 19.60
20644 Zero Query   17 770 19.59
31
27
119 Servers   116 19.59
17
17
41 Play on Words   43 3314 19.59
21
24
21572 Marble & store   3 135 19.58
17
15
26771 Almost Prime Numbers Again   17 332 19.57
24
20
19037 Magical colorful cats (easy)   20 19.57
22268 Euler Totient Function Sieve   29 408 19.54
23
21
4458 Rainbow   2 38 19.53
34
42
3415 Shrinking Polygons   1 237 19.53
17
34
40982 Teleporters and Gems II   4 35 19.52
9
1
22002 English   18 19.51
34229 "Operation - Modulo"   19 956 19.50
2
16
1712 Permalex   -1 174 19.50
23
17
25001 Red Blue Line Segments   2 319 19.49
28
26
10231 Wizarding Duel   1 75 19.48
1
1
7946 Check Ramsey   2 13 19.48
9
9
4546 Tobo or not Tobo   2 268 19.47
26
26
9652 Robots on a grid   21 865 19.47
17
13
18458 Very Friends 2   4 40 19.45
23
23
7389 Rating Hazard   25 19.44
30783 Ada and Cucumber   6 110 19.44
34
24
88 Which is Next   1 132 19.44
34
34
25214 Ohani And The Game   81 19.43
11
8
14329 Magic of the locker   19 2633 19.41
4
13
6779 Can you answer these queries VII   21 1454 19.41
38
28
12933 n-divisors   60 2340 19.39
18
17

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