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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
16178 Change   27 23.75
15634 Lennys Lucky Lotto Lists   10 214 34.23
7
14
26843 Who is the Best?   2 40.00
34229 "Operation - Modulo"   18 354 22.54
2
16
4227 "Shortest" pair of paths   3 180 36.47
23
17
4302 (K,N)-Knight   3 303 24.51
14
24
2140 (un)Fair Play   71 38.14
3973 0 0 Pairs   3 778 27.10
17
14
1451 01 Sequence   94 29.16
10676 0110SS   24 1681 41.09
13
9
19971 100pct failure in 72 hours   1 7 54.00
17
50
381 106 miles to Chicago   48 2992 36.26
15
14
9952 111…1 Squared   8 1684 47.02
5
10
5725 123 Sequence   2 116 23.62
1
1
24999 1807   10 503 38.38
15
18
9511 24-Puzzle   18 21.88
27301 2D arrays with XOR property   4 12 53.12
23
39
9721 2s Complement   1 164 31.36
34
34
21409 2x2 Subgrid Sum Problem (generalized)   1 4 40.00
21407 2x2 Subgrid Sum Problem (medium)   15 22.09
11180 369 Numbers   15 604 12.39
23
23
1448 3D Cover   2 87 26.40
34
26
1296 4 values whose sum is 0   62 4825 24.84
18
14
6690 A - Comparison Expressions   53 33.33
7555 A - Crazy Rows   2 166 24.80
17
21
18467 A Brief Expedition   11 258 56.01
15
15
3377 A Bug’s Life   328 13060 26.63
12
13
9636 A Canvas Building   62 18.91
17
17
1326 A Chase In WonderLand   2 388 13.26
9
1
11904 A Classic Myth - Flatland Superhero   5 46.15
5271 A Coin Game   4 447 28.78
21
30
19551 A Colorful world   2 84 31.54
1
1
35088 A Complex Cone   2 49 20.79
9
34
376 A concrete simulation   13 1638 34.27
10
11
4164 A conjecture of Paul Erdős   19 1426 45.39
13
13
22675 A conjecture of Paul Erdős (hard)   2 3 4.48
34
34
34863 A Cumulative Sum Problem   4 20 19.32
34
39
4559 A Day at the Races   122 17.14
4461 A Famous Airport Manager   20 15.78
11578 A Famous City   10 649 30.14
17
21
11575 A Famous Equation   2 65 28.31
34
34
11580 A Famous Game   218 28.69
28
28
11582 A Famous Grid   2 175 16.86
17
17
11573 A Famous ICPC Team   9 1988 37.76
2
8
11576 A Famous King’s Trip   16 8.61
11574 A Famous Stone Collector   3 109 36.13
9
23
18466 A Frightening Evening   106 29.00
1
1
10460 A function over factors   1 91 34.84
1
17
1471 A Game of Pearls   1 39 30.40
17
17
1447 A Game of Toy Bricks   36 35.09

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