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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
12241 Classification from ErdÅ‘s and Selfridge   5 27 17.59
28
28
12304 Smallest Inverse Sum of Divisors   5 87 27.88
17
24
12726 XOR Game   5 534 43.74
11
13
12746 Colorful Circle (EASY)   5 463 20.68
28
23
12943 Counting   5 79 47.71
8
30
13096 Amr Samir   5 916 31.08
9
10
13105 DNA   5 641 36.85
11
24
13405 MayanCalendar   5 121 54.45
8
8
13838 Mosty! Find Gn   5 556 49.50
9
24
14175 Power Factor Sum Sum (hard)   5 39 36.97
26
26
14823 Advanced Battleships   5 50 13.53
23
23
14935 Cactus   5 164 19.31
16
14
15215 David and his Obsession   5 426 41.32
12
9
15439 Zombie Outbreak   5 69 25.74
21
21
15506 Helping Igor   5 98 36.10
15
12
15847 Equalize the Sectors   5 155 60.25
10
27
16034 Minimum Number   5 491 16.05
11
1
16134 Save the cows!   5 59 14.05
1
6
16282 Horace and his primes   5 257 40.69
27
27
16283 Treasure Island   5 131 24.53
17
15
16300 Playing with isosceles triangle   5 313 26.98
13
21
17406 Cheating a Boolean Tree   5 113 35.28
23
15
17559 Two Game   5 317 36.97
1
39
17627 Family members   5 426 59.98
9
15
17660 The Bridge to Home   5 115 34.96
23
34
17707 Constructible Regular Polygons   5 500 55.65
8
8
17731 Buying Integers   5 108 40.83
8
11
18917 Dukkar and Pikka   5 299 56.03
7
23
18932 Sum of primes (reverse mode)   5 21 17.44
45
45
18939 K-th smallest number   5 211 13.86
13
17
19224 Lights, Snakes and Cages   5 85 17.52
24
34
19957 GETTING AN AP   5 488 36.75
8
12
19975 Amazing Prime Sequence (hard)   5 83 42.49
39
45
20170 Coloring Segments   5 88 20.64
31
34
20654 Interesting Subset   5 95 23.50
11
14
20846 Interesting Selection   5 123 43.21
13
26
20970 Alia and Handsome Devil   5 391 30.43
17
12
20979 Good   5 76 42.17
17
27
21353 Avantgarde and Doughnut   5 19 45.90
21
34
21360 Suffix Equal Prefix   5 515 28.85
13
13
21414 Count The Indexes 2   5 41 18.11
37
24
21456 I Ken Bit Yu   5 115 30.69
9
21
21457 House Fence   5 143 27.93
9
21
21525 Red John is Back   5 315 53.58
6
17
21964 Golf Bot   5 82 35.81
34
27
22303 Mau-Mau   5 75 16.67
36
17
22531 Yo Yo Jagdish Singh   5 115 44.29
12
12
22535 String Play   5 46 43.44
21
21
22549 Divisors of factorial (extreme)   5 76 26.45
34
34
22553 Stack Overflow   5 132 26.41
12
10

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