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list of challenge problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
270 Digits of Pi   13 5871 71.27
9
19
1414 SuDoku Puzzle   5 432 53.73
30
21
13929 Matrix Exponentiation   2 83 50.66
23
23
127 Johnny Goes Shopping   9 1500 65.89
20
24
218 Points on a Sphere   1 188 67.53
17
26
317 Simple Image Recognition   3 317 72.56
17
26
2624 JawBreaker Game   1 86 61.16
26
26
31757 Hamster   3 15 62.24
26
26
919 Prime checker   10 1620 65.43
15
28
18931 Sum of primes   4 55 25.24
23
28
295 Bytelandian Origami   1 27 61.84
17
34
528 Shortest Superstring   4 174 48.18
28
34
755 Rectangles in a Square   1 31 63.51
17
34
1422 Digital Image Processing   2 121 74.53
34
34
1481 Yet another computer network problem   23 66.75
34
2629 Robo Eye   1 39 78.03
34
34
2732 Attack A Single Test File!   1 3 40.74
34
34
8638 Sum of Fibonacci numbers   1 135 72.81
50
34
11719 The dojo s corridor   2 71 64.41
26
34
12874 Pell Fourth   2 13 66.13
17
34
12919 Man of Steel   1 25 67.46
17
34
13423 64bit-Fibonacci   6 149 43.78
38
34
14808 Discrete Math Problem (shorten)   1 24 58.99
34
34
16509 Divisors   1 55 61.23
1
34
18837 Boring Factorials (Ultimate)   1 24 49.45
34
34
22217 Help Santa Claus to Pack the Toys   1 5 66.74
34
34
26801 Hieroglyphs   2 23 58.21
42
34
27841 Sabotage   2 30 56.37
34
34
34316 Chess Variants Showdown   1 1 70.25
34
34
10295 HQNP Incomputable Hard   3 61 76.49
21
38
11975 PIEK   182 92.21
34
42
11689 Real Roots   1 34 94.29
50
50
13418 Fibonacci factorization   1 10 30.60
50
50
17820 Guess The Number With Lies v5   1 72 72.66
50
50
20651 Reliability of Logic Circuits   49 66.56
50
50
72 Food Shortage in Byteland   260 54.90
126 Solovay-Strassen Inverted   101 57.57
219 Pawns Gone Wild   23 60.70
222 The Burning City   43 58.65
225 Nightmare in the Towers of Hanoi   19 47.79
232 Bytelandian Telecom   42 68.25
240 Santa Claus and the Presents   121 73.44
246 Plant a Christmas Tree   88 43.20
276 Herdkeeper   50 68.27
289 The Turing Music Box   73 68.95
294 Johnny and the Optimisation of Homework   16 45.43
313 The Game of Crosses & Crosses   26 75.52
315 The Secret Fellowship of Byteland   45 67.98
316 Japan Crossword   159 68.28
326 Enjoying a Multiplayer Game   18 71.32

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