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list of challenge problems

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ID NAME CODE USERS ACC %
218    Points on a Sphere PSPHERE 196 67.64
219    Pawns Gone Wild PAWNS 26 58.40
270    Digits of Pi PIVAL 5913 71.15
314    Digits of e EVAL 3026 60.11
525    Fractions Calculator TFRACAL2 54 41.07
759    Hard Image Recognition HIR 21 67.28
919    Prime checker PRIC 1626 65.38
1416    Electrification ELC 38 38.73
1422    Digital Image Processing DIP 126 74.62
1558    Math II MATH2 39 73.43
1711    Greatest Common Divisor GCD 112 30.96
1742    Brainf_ck BRAINF_K 73 36.25
2624    JawBreaker Game JAWB 86 60.96
4246    Place the Numbers II PLCNUM2 546 66.52
6295    Area Difference SQDIFF 393 44.65
6646    Fully Parenthesized Expression BRACKETS 26 43.75
7063    Cycles, More Cycles CYCLE 21 82.50
7105    Reverse the Input REVINPUT 548 34.58
7480    Nth Prime NPRIME 621 45.61
7958    Prisoner of Benda (Challenge) BENDA 18 44.57
8102    Christmas Tree XMAS 832 66.29
8315    Number to Word NUMWORD 230 42.52
8638    Sum of Fibonacci numbers FIBSUM 137 73.02
8672    Distributing the balls BALLS 28 32.59
8675    Equation Check EQCHECK 266 57.44
8676    Digits of Phi (Golden Ratio) PHIVAL 294 53.58
8733    Summing up Last digits PLDGTS 31 61.86
8950    Grid points GRIDPNT 46 58.06
9380    Connecting three towns THREETWN 125 81.06
10295    HQNP Incomputable Hard HQNP2 61 76.53
11397    Find all independent nodes INDISET 26 89.36
11410    Find New SPOJ Problems FINDPROB 8 42.07
11445    EASY MATH (Challenge) EASYMATC 173 45.73
11689    Real Roots REALROOT 44 92.48
11719    The dojo s corridor M5TILE 74 64.34
11746    Sum the Series SUMUP 1941 58.78
11790    Size Contest!!!Reloaded!! JH1 350 38.74
11975    PIEK PIEK2 183 92.17
12393    Enigma Machine ENIGMAS 23 56.92
12655    Strongly Connected Chemicals SCCHEM 12 95.35
12845    Minimum knight moves Challenge NAKANJC 346 72.09
12874    Pell Fourth PELLFOUR 13 58.02
12919    Man of Steel MOS 25 67.46
12996    Wow Square WOW_SQR 127 54.73
13366    TWO KINGS CONQUER 19 58.15
13418    Fibonacci factorization BMS1988 10 29.70
13423    64bit-Fibonacci FIB64 152 43.83
13872    The SPP constant challenge SPPC 19 58.93
13929    Matrix Exponentiation MATEX 84 49.63
15036    Automatic Brainf##k Code Generator (Shortening AI) BFK_AUTO 94 51.85
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