list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
16178 Change   59 10.08
15634 Lennys Lucky Lotto Lists   11 226 34.42
7
14
26843 Who is the Best?   4 31.58
34229 "Operation - Modulo"   19 751 19.31
2
16
4227 "Shortest" pair of paths   3 202 39.02
23
17
4302 (K,N)-Knight   3 309 24.66
14
24
2140 (un)Fair Play   74 38.91
41455 ....   1 11 21.92
17
17
3973 0 0 Pairs   4 800 27.29
15
15
1451 01 Sequence   94 28.29
10676 0110SS   25 1742 41.14
13
9
19971 100pct failure in 72 hours   1 8 45.90
17
50
381 106 miles to Chicago   50 3135 36.53
15
14
9952 111…1 Squared   8 1744 46.67
5
10
5725 123 Sequence   2 120 23.56
1
1
24999 1807   10 518 38.65
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 21.24
11180 369 Numbers   17 751 12.32
26
24
1448 3D Cover   3 91 26.87
34
26
1296 4 values whose sum is 0   63 5046 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   340 15104 27.33
12
13
9636 A Canvas Building   65 18.95
17
17
1326 A Chase In WonderLand   2 402 13.44
9
1
11904 A Classic Myth - Flatland Superhero   10 46.43
5271 A Coin Game   4 501 30.37
21
30
19551 A Colorful world   3 87 31.64
6
1
35088 A Complex Cone   2 51 21.50
9
34
376 A concrete simulation   15 1711 34.29
11
12
4164 A conjecture of Paul Erdős   23 1993 45.20
16
14
22675 A conjecture of Paul Erdős (hard)   2 4 5.56
34
34
34863 A Cumulative Sum Problem   4 26 20.49
34
39
4559 A Day at the Races   122 17.08
4461 A Famous Airport Manager   23 16.36
11578 A Famous City   10 753 30.79
15
20
11575 A Famous Equation   2 71 28.14
34
34
11580 A Famous Game   379 33.94
28
28
11582 A Famous Grid   2 186 16.65
17
17
11573 A Famous ICPC Team   10 2028 37.61
2
8
11576 A Famous King’s Trip   20 9.72
11574 A Famous Stone Collector   3 122 35.60
9
23
18466 A Frightening Evening   1 113 29.04
1
1
10460 A function over factors   1 97 33.05
1
17
1471 A Game of Pearls   1 39 30.00
17
17

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