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list of challenge problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
4163 Relative Board   6 38.10
4246 Place the Numbers II   1 540 66.32
1
1
5842 Polybius square   2 1025 59.25
34
12
6125 Dos Date   2 788 55.81
17
6
6173 Burned Pancakes Tower   1 23 64.61
17
17
6295 Area Difference   2 388 44.61
6
5
6646 Fully Parenthesized Expression   26 43.75
7063 Cycles, More Cycles   16 83.43
7105 Reverse the Input   3 544 34.53
28
12
7225 Word To Number   2 156 61.22
17
9
7480 Nth Prime   4 618 45.56
26
12
7958 Prisoner of Benda (Challenge)   10 50.00
8102 Christmas Tree   4 825 66.23
5
5
8638 Sum of Fibonacci numbers   1 135 72.81
50
34
8672 Distributing the balls   26 32.73
8675 Equation Check   1 262 57.52
1
9
8676 Digits of Phi (Golden Ratio)   2 293 53.66
17
17
8733 Summing up Last digits   31 72.01
8950 Grid points   44 57.73
9380 Connecting three towns   2 122 81.08
1
17
10295 HQNP Incomputable Hard   3 61 76.49
21
38
11397 Find all independent nodes   23 89.23
11410 Find New SPOJ Problems   8 42.96
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
11689 Real Roots   1 34 94.29
50
50
11719 The dojo s corridor   2 71 64.41
26
34
11746 Sum the Series   7 1863 58.87
6
13
11790 Size Contest!!!Reloaded!!   1 347 38.70
9
1
11793 Cartesian Shortest Path   52 44.15
11815 Tiling a WxH Grid With Dominoes   41 54.16
34
17
11849 A Very Easy Problem! (Challenge Mode)   2 80 50.79
42
9
11975 PIEK   182 92.21
34
42
12393 Enigma Machine   1 21 56.90
12655 Strongly Connected Chemicals   5 100.00
12845 Minimum knight moves Challenge   3 343 72.13
34
17
12874 Pell Fourth   2 13 66.13
17
34
12919 Man of Steel   1 25 67.46
17
34
12996 Wow Square   125 55.34
13366 TWO KINGS   17 62.42
13418 Fibonacci factorization   1 10 30.60
50
50
13423 64bit-Fibonacci   6 149 43.78
38
34
13872 The SPP constant challenge   19 61.46
13929 Matrix Exponentiation   2 83 50.66
23
23
14530 Quadratic primes   1 10 63.31
15036 Automatic Brainf##k Code Generator (Shortening AI)   3 92 51.86
26
17
15619 Optimal Swap Sort   9 43.29
15673 Alice and Bob plays again   14 67.01
16509 Divisors   1 55 61.23
1
34

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