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list of challenge problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
53 Kamil   26 6364 49.35
7
5
378 Size Contest   21 10751 55.90
6
1
270 Digits of Pi   13 5869 71.28
9
19
919 Prime checker   10 1619 65.43
15
28
127 Johnny Goes Shopping   9 1498 65.89
20
24
3947 Brainf F##k Writing   9 1496 74.47
23
3
11746 Sum the Series   7 1863 58.87
6
13
1423 Digits of SQRT(2)   6 2735 67.40
11
11
13423 64bit-Fibonacci   6 149 43.78
38
34
22717 Kejriwal And Broom   6 300 56.92
1
4
314 Digits of e   5 2996 59.54
3
3
1414 SuDoku Puzzle   5 432 53.73
30
21
528 Shortest Superstring   4 174 48.18
28
34
1492 Lexicographic sort   4 458 50.50
17
9
7480 Nth Prime   4 618 45.56
26
12
8102 Christmas Tree   4 825 66.23
5
5
18931 Sum of primes   4 55 25.24
23
28
298 Closing down Railway Lines   3 131 83.37
26
17
317 Simple Image Recognition   3 317 72.56
17
26
7105 Reverse the Input   3 544 34.53
28
12
10295 HQNP Incomputable Hard   3 61 76.49
21
38
12845 Minimum knight moves Challenge   3 342 72.07
34
17
15036 Automatic Brainf##k Code Generator (Shortening AI)   3 92 51.86
26
17
19558 PPrimes   3 131 57.25
21
12
31757 Hamster   3 15 62.24
26
26
155 Solving the Puzzle   2 12 5.07
34
17
1422 Digital Image Processing   2 121 74.53
34
34
4760 Primes in Brainf##k   2 139 66.30
17
6
5842 Polybius square   2 1025 59.25
34
12
6125 Dos Date   2 788 55.81
17
6
6295 Area Difference   2 388 44.61
6
5
7225 Word To Number   2 156 61.22
17
9
8473 PATHS   2 308 44.95
30
5
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
11719 The dojo s corridor   2 71 64.41
26
34
11849 A Very Easy Problem! (Challenge Mode)   2 80 50.79
42
9
12874 Pell Fourth   2 13 66.13
17
34
13929 Matrix Exponentiation   2 83 50.66
23
23
19920 Strchr in BF   2 9 72.55
26
17
26801 Hieroglyphs   2 23 58.21
42
34
27841 Sabotage   2 30 56.37
34
34
218 Points on a Sphere   1 188 67.53
17
26
285 Atomic Shelters   1 121 63.05
17
17
295 Bytelandian Origami   1 27 61.84
17
34
321 X-Words   1 19 64.46
34
17
353 Displace   1 43 47.08
34
17
2004 Analyse Simple Arithmetical Expressions   1 724 51.39
17
1
2471 Magic Program II   1 68 35.65
17
17

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