list of challenge problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
11689 Real Roots   1 44 92.48
50
50
13418 Fibonacci factorization   1 10 29.70
50
50
17820 Guess The Number With Lies v5   1 74 72.71
50
50
19205 Modular Bernoulli   1 7 48.25
50
50
20651 Reliability of Logic Circuits   49 66.56
50
50
11975 PIEK   183 92.17
34
42
10295 HQNP Incomputable Hard   3 61 76.53
21
38
240 Santa Claus and the Presents   1 126 73.44
17
34
295 Bytelandian Origami   1 30 62.09
17
34
315 The Secret Fellowship of Byteland   1 48 67.65
34
34
316 Japan Crossword   1 163 68.20
34
34
528 Shortest Superstring   4 176 48.04
28
34
755 Rectangles in a Square   1 32 59.73
17
34
1422 Digital Image Processing   2 126 74.62
34
34
1481 Yet another computer network problem   28 66.84
34
2629 Robo Eye   1 39 78.03
34
34
2732 Attack A Single Test File!   1 3 34.38
34
34
7958 Prisoner of Benda (Challenge)   1 18 44.57
34
34
8638 Sum of Fibonacci numbers   1 137 73.02
50
34
11719 The dojo s corridor   2 74 64.76
26
34
12874 Pell Fourth   2 13 58.02
17
34
12919 Man of Steel   1 25 67.46
17
34
13423 64bit-Fibonacci   6 152 43.84
38
34
14808 Discrete Math Problem (shorten)   1 26 58.86
34
34
16509 Divisors   1 55 61.42
1
34
18837 Boring Factorials (Ultimate)   1 25 49.60
34
34
22217 Help Santa Claus to Pack the Toys   1 5 64.75
34
34
26801 Hieroglyphs   2 25 58.05
42
34
27841 Sabotage   2 32 55.07
34
34
34316 Chess Variants Showdown   1 1 47.22
34
34
41043 Odwracanie kartek - Pages reading   1 19 27.27
1
34
18931 Sum of primes   4 58 25.30
23
28
919 Prime checker   10 1627 65.38
15
28
218 Points on a Sphere   1 196 67.64
17
26
317 Simple Image Recognition   3 322 73.13
17
26
2624 JawBreaker Game   1 86 60.96
26
26
31757 Hamster   3 18 61.11
26
26
127 Johnny Goes Shopping   9 1527 65.85
20
24
13929 Matrix Exponentiation   2 84 49.63
23
23
1414 SuDoku Puzzle   5 440 54.01
27
21
270 Digits of Pi   13 5915 71.15
9
19
155 Solving the Puzzle   2 12 4.50
34
17
285 Atomic Shelters   1 125 62.66
17
17
298 Closing down Railway Lines   3 134 83.36
26
17
321 X-Words   1 22 64.10
34
17
353 Displace   1 45 46.77
34
17
2471 Magic Program II   1 68 35.60
17
17
6173 Burned Pancakes Tower   1 25 61.47
17
17
6877 Terminating or Non-Terminating   34 43.19
17
17
7965 The Electronic Dice   1 52 54.03
34
17

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