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 1026 59.23
34
12
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 34.48
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   4 826 66.24
5
5
8315 Number to Word   1 227 42.39
34
1
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
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 1864 58.88
6
13
11790 Size Contest!!!Reloaded!!   1 347 38.70
9
1
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
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
17257 Guess The Number With Lies v1   31 47.29
17308 Guess The Number With Lies v2   68 54.30
17598 Guess The Number With Lies v4   13 63.16
17820 Guess The Number With Lies v5   1 72 72.66
50
50
17867 Tone Transposition   5 66.36
18837 Boring Factorials (Ultimate)   1 24 49.45
34
34

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