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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
16178 Change   59 10.13
15634 Lennys Lucky Lotto Lists   11 226 34.38
7
14
26843 Who is the Best?   4 28.57
34229 "Operation - Modulo"   19 795 18.81
2
16
4227 "Shortest" pair of paths   3 208 40.09
23
17
4302 (K,N)-Knight   3 311 24.80
14
24
2140 (un)Fair Play   74 38.68
41455 ....   1 11 17.58
17
17
3973 0 0 Pairs   4 803 27.32
15
15
1451 01 Sequence   94 28.29
10676 0110SS   26 1754 40.96
13
9
19971 100pct failure in 72 hours   1 8 45.90
17
50
381 106 miles to Chicago   50 3155 36.54
15
14
9952 111…1 Squared   8 1780 46.31
5
10
5725 123 Sequence   2 120 23.56
1
1
24999 1807   10 521 38.50
15
18
9511 24-Puzzle   23 23.14
27301 2D arrays with XOR property   4 14 43.48
23
39
9721 2s Complement   1 173 31.83
34
34
21409 2x2 Subgrid Sum Problem (generalized)   1 6 42.11
21407 2x2 Subgrid Sum Problem (medium)   17 21.05
11180 369 Numbers   17 777 12.41
26
24
1448 3D Cover   3 91 26.87
34
26
1296 4 values whose sum is 0   64 5067 24.87
18
14
6690 A - Comparison Expressions   54 32.76
7555 A - Crazy Rows   2 180 25.47
17
21
18467 A Brief Expedition   11 272 54.44
15
15
3377 A Bug’s Life   342 15387 27.44
12
13
9636 A Canvas Building   66 19.12
17
17
1326 A Chase In WonderLand   2 404 13.47
9
1
11904 A Classic Myth - Flatland Superhero   10 46.43
5271 A Coin Game   4 545 31.74
21
30
19551 A Colorful world   3 87 31.64
6
1
35088 A Complex Cone   2 50 20.98
9
34
376 A concrete simulation   15 1718 34.31
11
12
4164 A conjecture of Paul Erdős   23 2231 44.22
16
14
22675 A conjecture of Paul Erdős (hard)   2 4 5.56
34
34
34863 A Cumulative Sum Problem   5 29 21.53
34
42
4559 A Day at the Races   122 17.08
4461 A Famous Airport Manager   23 16.36
11578 A Famous City   10 777 30.88
16
21
11575 A Famous Equation   2 73 27.13
34
34
11580 A Famous Game   382 34.08
28
28
11582 A Famous Grid   2 186 16.62
17
17
11573 A Famous ICPC Team   10 2033 37.63
2
8
11576 A Famous King’s Trip   20 9.72
11574 A Famous Stone Collector   3 122 35.42
9
23
18466 A Frightening Evening   1 116 29.06
1
1
10460 A function over factors   1 97 32.63
1
17
1471 A Game of Pearls   1 39 30.00
17
17

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