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list of challenge problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
218 Points on a Sphere   1 196 67.64
17
26
219 Pawns Gone Wild   26 58.40
270 Digits of Pi   13 5915 71.15
9
19
314 Digits of e   5 3029 60.12
3
3
525 Fractions Calculator   54 41.07
759 Hard Image Recognition   21 67.28
919 Prime checker   10 1627 65.38
15
28
1416 Electrification   38 38.73
1422 Digital Image Processing   2 126 74.62
34
34
1558 Math II   39 73.43
1711 Greatest Common Divisor   113 30.87
1742 Brainf_ck   73 36.25
2624 JawBreaker Game   1 86 60.96
26
26
4246 Place the Numbers II   1 546 66.49
1
1
6295 Area Difference   2 394 44.67
6
5
6646 Fully Parenthesized Expression   26 43.75
7063 Cycles, More Cycles   21 82.50
7105 Reverse the Input   3 549 34.63
28
12
7480 Nth Prime   4 621 45.61
26
12
7958 Prisoner of Benda (Challenge)   1 18 44.57
34
34
8102 Christmas Tree   4 832 66.29
5
5
8315 Number to Word   1 230 42.52
34
1
8638 Sum of Fibonacci numbers   1 137 73.02
50
34
8672 Distributing the balls   28 33.54
8675 Equation Check   2 267 57.35
1
6
8676 Digits of Phi (Golden Ratio)   3 296 53.42
9
9
8733 Summing up Last digits   31 61.86
8950 Grid points   46 58.06
9380 Connecting three towns   2 125 81.06
1
17
10295 HQNP Incomputable Hard   3 61 76.53
21
38
11397 Find all independent nodes   26 89.36
11410 Find New SPOJ Problems   8 42.07
11445 EASY MATH (Challenge)   4 177 46.12
17
17
11689 Real Roots   1 44 92.48
50
50
11719 The dojo s corridor   2 74 64.76
26
34
11746 Sum the Series   7 1941 58.80
6
13
11790 Size Contest!!!Reloaded!!   1 350 38.74
9
1
11975 PIEK   183 92.17
34
42
12393 Enigma Machine   1 23 56.92
12655 Strongly Connected Chemicals   13 95.45
12845 Minimum knight moves Challenge   3 346 72.09
34
17
12874 Pell Fourth   2 13 58.02
17
34
12919 Man of Steel   1 25 67.46
17
34
12996 Wow Square   127 54.73
13366 TWO KINGS   19 58.15
13418 Fibonacci factorization   1 10 29.70
50
50
13423 64bit-Fibonacci   6 152 43.84
38
34
13872 The SPP constant challenge   19 58.93
13929 Matrix Exponentiation   2 84 49.63
23
23
15036 Automatic Brainf##k Code Generator (Shortening AI)   3 94 51.85
26
17

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