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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
677 A place for the brewery   209 27.63
5142 A Pair of Graphs   1 66 56.25
17
17
34575 A New Task for Ibrahim   7 36 53.33
4
28
32 A Needle in the Haystack   192 10821 38.17
15
13
8992 A los saltos   36 30.82
7969 A Knights’ Tale   3 76 23.33
17
17
4176 A Knightly Pursuit   2 63 27.56
26
17
15092 A Kleene Implementation   5 44.44
6950 A HUGE TOWER   1 123 47.23
1
34
4060 A game with probability   189 21.14
1419 A Game with Numbers   118 11950 61.62
3
10
1447 A Game of Toy Bricks   39 29.93
1471 A Game of Pearls   1 39 30.00
17
17
10460 A function over factors   1 97 33.00
1
17
18466 A Frightening Evening   1 113 29.04
1
1
11574 A Famous Stone Collector   3 122 35.60
9
23
11576 A Famous King’s Trip   20 9.72
11573 A Famous ICPC Team   10 2029 37.61
2
8
11582 A Famous Grid   2 186 16.65
17
17
11580 A Famous Game   379 33.94
28
28
11575 A Famous Equation   2 71 28.14
34
34
11578 A Famous City   10 758 30.85
15
20
4461 A Famous Airport Manager   23 16.36
4559 A Day at the Races   122 17.08
34863 A Cumulative Sum Problem   5 27 20.77
34
42
22675 A conjecture of Paul Erdős (hard)   2 4 5.56
34
34
4164 A conjecture of Paul Erdős   23 2023 44.80
16
14
376 A concrete simulation   15 1712 34.29
11
12
35088 A Complex Cone   2 51 21.50
9
34
19551 A Colorful world   3 87 31.64
6
1
5271 A Coin Game   4 502 30.46
21
30
11904 A Classic Myth - Flatland Superhero   10 46.43
1326 A Chase In WonderLand   2 403 13.46
9
1
9636 A Canvas Building   65 18.89
17
17
3377 A Bug’s Life   342 15182 27.34
12
13
18467 A Brief Expedition   11 272 54.44
15
15
7555 A - Crazy Rows   2 180 25.47
17
21
6690 A - Comparison Expressions   54 32.76
1296 4 values whose sum is 0   63 5052 24.87
18
14
1448 3D Cover   3 91 26.87
34
26
11180 369 Numbers   17 756 12.32
26
24
21407 2x2 Subgrid Sum Problem (medium)   17 21.24
21409 2x2 Subgrid Sum Problem (generalized)   1 6 42.11
9721 2s Complement   1 173 31.83
34
34
27301 2D arrays with XOR property   4 14 43.48
23
39
9511 24-Puzzle   23 23.14
24999 1807   10 519 38.42
15
18
5725 123 Sequence   2 120 23.56
1
1
9952 111…1 Squared   8 1750 46.60
5
10
381 106 miles to Chicago   50 3141 36.56
15
14

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