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list of challenge problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
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
11975 PIEK   182 92.21
34
42
10295 HQNP Incomputable Hard   3 61 76.49
21
38
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
18931 Sum of primes   4 55 25.24
23
28
919 Prime checker   10 1620 65.43
15
28
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
127 Johnny Goes Shopping   9 1500 65.89
20
24
13929 Matrix Exponentiation   2 83 50.66
23
23
1414 SuDoku Puzzle   5 432 53.73
30
21
270 Digits of Pi   13 5871 71.27
9
19
155 Solving the Puzzle   2 12 5.07
34
17
285 Atomic Shelters   1 121 63.05
17
17
298 Closing down Railway Lines   3 131 83.37
26
17
321 X-Words   1 19 64.46
34
17
353 Displace   1 43 47.08
34
17
2471 Magic Program II   1 68 35.65
17
17
6173 Burned Pancakes Tower   1 23 64.61
17
17
6877 Terminating or Non-Terminating   34 43.41
17
17
7965 The Electronic Dice   1 52 54.03
34
17
8676 Digits of Phi (Golden Ratio)   2 293 53.66
17
17
9380 Connecting three towns   2 122 81.08
1
17
11445 EASY MATH (Challenge)   2 155 45.86
17
17
11451 Aritho-geometric Series (AGS) (Challenge)   1 55 47.17
17
17
11462 Fun with Fibonacci Series (Challenge)   1 288 34.35
17
17
11815 Tiling a WxH Grid With Dominoes   41 54.16
34
17

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