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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
11540 Training   18 26.67
15769 Enjoy Adding GP to Series   2 63 26.67
28
34
18102 New year love story   2 83 26.67
34
34
11947 Counting Words   2 169 26.66
17
17
15566 Coprime Again   7 73 26.66
27
34
21170 Constellation of the parallelogram   1 92 26.64
17
17
22528 Paths in a Tree   3 45 26.64
21
21
8075 Sequence   3 59 26.63
39
39
392 Spin   44 26.63
1
17
32948 Ada and Fimbers   5 109 26.63
20
23
4459 Muzidabutur   34 26.62
694 Distinct Substrings   92 5782 26.61
21
24
8896 Pattern Matching   1 32 26.58
17
13
4555 Einbahnstrasse   2 490 26.56
22
9
30759 Ada and Species   10 134 26.56
27
31
40148 Distinct Cyclings   1 15 26.56
42
34
9038 Chessboard Billiard   54 26.56
22553 Stack Overflow   5 136 26.56
12
10
5542 Counting pairs   4 135 26.54
39
36
26843 Who is the Best?   1 10 26.53
34
34
12304 Smallest Inverse Sum of Divisors   5 100 26.52
17
24
203 Potholers   22 2290 26.51
16
12
11469 Balanced Cow Subsets   6 445 26.49
36
31
8750 Wordplay   4 99 26.48
17
34
10514 K12 - Building Construction   60 2073 26.48
12
16
10095 Caper Pizza   29 26.47
283 Naptime   676 26.45
17
1
4378 Twofive   66 26.45
1785 Code   2 231 26.44
26
30
6325 Many polygons   3 202 26.44
12
17
10228 Magic Grid   44 1802 26.43
14
19
5144 Cryptography Reloaded (Act I)   34 26.43
212 Water among Cubes   54 1615 26.43
25
27
16636 Journey   59 26.42
5672 Captain Selection   -1 10 26.42
10506 Prendonians   52 26.42
26257 detective sherlock holmes   -12 217 26.42
15
17
33 Trip   17 2073 26.41
25
16
18180 Love Story 1   13 1142 26.38
9
6
15165 primes triangle (II)   2 18 26.38
39
17
3975 Most Servings Meal   8 354 26.37
28
28
226 Jewelry and Fashion   1 20 26.36
34
50
5971 LCM Sum   83 3962 26.35
20
29
8952 Catapult that ball   34 3212 26.34
12
12
186 The lightest language   1 184 26.33
17
34
3678 Cattle Bruisers   91 26.33
10419 Polish Language   104 26.31
8063 Dividing Stones   2 167 26.30
17
17
25690 Laser Beam   9 75 26.30
9
22
15996 Number Magic II   27 26.28
26
17

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