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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
7600 Milk Trading   5 183 30.24
1
28
7947 Almost square factorisation   5 120 51.97
8
11
7973 Sometimes, a penalty is good!   5 1201 29.49
6
8
8591 Prime Permutations   5 106 31.02
28
23
9587 The Prime conjecture   5 572 34.46
9
9
9644 Imperialism   5 173 30.59
8
14
10270 Temperature   5 218 33.33
21
21
10466 Enough of analyzing, let’s play   5 251 45.05
17
23
10515 K12-Combinations   5 412 28.00
5
17
10547 Delivery Route   5 52 19.33
34
34
10649 Mirror Number   5 180 21.62
13
30
10711 VUK   5 184 52.90
20
23
10931 Online Bridge Searching   5 98 35.63
34
34
11103 PrimeFactorofLCM   5 583 25.68
17
17
11321 G-One Sort   5 776 37.97
13
17
11472 Amazing Maze   5 261 29.01
17
26
11477 Meeting For Party   5 483 27.99
17
12
11844 Binary Sequence of Prime Number   5 225 21.43
34
28
12012 grace marks   5 224 22.86
21
21
12030 Blackout   5 374 44.59
20
15
12076 Longest Common Subsequence   5 129 4.34
50
50
12241 Classification from ErdÅ‘s and Selfridge   5 28 18.31
28
28
12304 Smallest Inverse Sum of Divisors   5 90 28.43
17
24
12714 Fatawy   5 145 25.38
14
4
12726 XOR Game   5 536 43.81
11
13
12746 Colorful Circle (EASY)   5 463 20.68
28
23
12943 Counting   5 80 47.73
8
30
13096 Amr Samir   5 917 31.10
9
10
13105 DNA   5 680 33.88
11
24
13405 MayanCalendar   5 121 54.45
8
8
13838 Mosty! Find Gn   5 558 49.64
9
24
14175 Power Factor Sum Sum (hard)   5 39 36.52
26
26
14823 Advanced Battleships   5 50 13.53
23
23
15143 play with prime numbers (I)   5 32 18.99
23
23
15148 play with prime numbers (II)   5 32 20.63
28
23
15215 David and his Obsession   5 426 41.32
12
9
15439 Zombie Outbreak   5 70 25.86
21
21
15506 Helping Igor   5 98 36.10
15
12
15847 Equalize the Sectors   5 156 59.90
10
27
16034 Minimum Number   5 492 16.05
11
1
16134 Save the cows!   5 59 14.05
1
6
16282 Horace and his primes   5 260 40.90
27
27
16283 Treasure Island   5 131 24.53
17
15
16300 Playing with isosceles triangle   5 315 26.90
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   5 504 55.81
8
8
17731 Buying Integers   5 108 40.75
8
11

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