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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
16178 Change   33 13.51
15634 Lennys Lucky Lotto Lists   11 218 33.75
7
14
26843 Who is the Best?   2 40.00
34229 "Operation - Modulo"   19 624 20.29
2
16
4227 "Shortest" pair of paths   3 196 37.85
23
17
4302 (K,N)-Knight   3 307 24.50
14
24
2140 (un)Fair Play   72 38.40
3973 0 0 Pairs   4 792 27.32
15
15
1451 01 Sequence   94 29.10
10676 0110SS   25 1713 41.11
13
9
19971 100pct failure in 72 hours   1 7 54.00
17
50
381 106 miles to Chicago   50 3093 36.49
15
14
9952 111…1 Squared   8 1726 46.67
5
10
5725 123 Sequence   2 118 23.68
1
1
24999 1807   10 515 38.44
15
18
9511 24-Puzzle   18 21.88
27301 2D arrays with XOR property   4 12 53.12
23
39
9721 2s Complement   1 171 31.89
34
34
21409 2x2 Subgrid Sum Problem (generalized)   1 5 38.46
21407 2x2 Subgrid Sum Problem (medium)   15 21.35
11180 369 Numbers   16 681 12.16
24
23
1448 3D Cover   3 88 26.44
34
26
1296 4 values whose sum is 0   64 4968 24.93
18
14
6690 A - Comparison Expressions   54 33.80
7555 A - Crazy Rows   2 176 25.38
17
21
18467 A Brief Expedition   11 269 54.69
15
15
3377 A Bug’s Life   340 14671 27.21
12
13
9636 A Canvas Building   63 18.89
17
17
1326 A Chase In WonderLand   2 399 13.39
9
1
11904 A Classic Myth - Flatland Superhero   6 46.67
5271 A Coin Game   4 479 29.74
21
30
19551 A Colorful world   3 85 31.36
6
1
35088 A Complex Cone   2 49 20.79
9
34
376 A concrete simulation   14 1687 34.15
11
12
4164 A conjecture of Paul Erdős   22 1740 45.12
16
14
22675 A conjecture of Paul Erdős (hard)   2 3 4.29
34
34
34863 A Cumulative Sum Problem   4 21 19.34
34
39
4559 A Day at the Races   122 17.14
4461 A Famous Airport Manager   20 15.78
11578 A Famous City   10 710 30.48
15
20
11575 A Famous Equation   2 68 27.67
34
34
11580 A Famous Game   340 34.43
28
28
11582 A Famous Grid   2 182 16.62
17
17
11573 A Famous ICPC Team   10 2016 37.69
2
8
11576 A Famous King’s Trip   16 8.61
11574 A Famous Stone Collector   3 120 35.71
9
23
18466 A Frightening Evening   1 112 29.20
1
1
10460 A function over factors   1 91 34.84
1
17
1471 A Game of Pearls   1 39 30.13
17
17
1447 A Game of Toy Bricks   36 35.09

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