list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
16178 Change   29 25.79
15634 Lennys Lucky Lotto Lists   10 206 34.01
7
14
26843 Who is the Best?   2 40.00
34229 "Operation - Modulo"   15 236 26.42
2
17
4227 "Shortest" pair of paths   3 177 36.15
23
17
4302 (K,N)-Knight   2 304 24.75
17
21
2140 (un)Fair Play   71 38.14
3973 0 0 Pairs   3 760 26.79
13
13
1451 01 Sequence   95 29.57
10676 0110SS   24 1653 40.96
13
9
19971 100pct failure in 72 hours   1 7 54.00
17
50
381 106 miles to Chicago   46 2930 36.24
15
14
9952 111…1 Squared   8 1665 47.06
5
10
5725 123 Sequence   2 115 23.49
1
1
24999 1807   10 489 38.20
15
18
9511 24-Puzzle   16 20.21
27301 2D arrays with XOR property   4 12 53.12
23
39
9721 2s Complement   1 163 31.39
34
34
21409 2x2 Subgrid Sum Problem (generalized)   1 4 40.00
21407 2x2 Subgrid Sum Problem (medium)   10 18.42
11180 369 Numbers   14 539 12.72
22
25
1448 3D Cover   2 89 26.85
34
26
1296 4 values whose sum is 0   62 4660 24.81
18
14
6690 A - Comparison Expressions   52 33.09
7555 A - Crazy Rows   2 164 24.54
17
21
18467 A Brief Expedition   11 259 56.40
15
15
3377 A Bug’s Life   315 11704 26.20
12
13
9636 A Canvas Building   62 19.10
17
17
1326 A Chase In WonderLand   1 375 13.04
17
1
11904 A Classic Myth - Flatland Superhero   5 46.15
19551 A Colorful world   2 83 31.39
1
1
35088 A Complex Cone   3 48 20.60
17
34
376 A concrete simulation   13 1614 34.56
10
11
4164 A conjecture of Paul Erdős   16 1182 46.73
12
11
22675 A conjecture of Paul Erdős (hard)   2 3 4.62
34
34
34863 A Cumulative Sum Problem   4 19 21.43
34
39
4559 A Day at the Races   105 23.14
4461 A Famous Airport Manager   21 17.91
11578 A Famous City   8 620 30.19
20
22
11575 A Famous Equation   2 64 28.21
34
34
11580 A Famous Game   192 27.31
28
28
11582 A Famous Grid   2 174 16.92
17
17
11573 A Famous ICPC Team   8 1972 37.66
2
9
11576 A Famous King’s Trip   17 8.94
11574 A Famous Stone Collector   3 113 40.25
9
23
18466 A Frightening Evening   101 28.16
1
1
10460 A function over factors   1 90 34.81
1
17
1471 A Game of Pearls   1 39 30.40
17
17
1447 A Game of Toy Bricks   36 35.09
1419 A Game with Numbers   108 9798 61.04
2
10

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