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Try your hand at one of the practice problems, and submit your solution in the language of your choice (our judge accepts solutions in over 35+ languages). Receive points, and move up through the CodeChef ranks. Get better, and better prepare yourself for the competitions

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Name Code Successful Submissions Accuracy
   Bytelandian gold coins COINS 1666 12.57
   Prime Generator PRIME1 897 10.88
   Marbles MARBLES 711 19.50
   Array Transform ARRAYTRM 414 24.03
   The Next Palindrome PALIN 390 7.80
   Stepford Houses INSOMA3 369 17.90
   Mixtures MIXTURES 235 22.59
   Flipping Coins FLIPCOIN 216 8.57
   Play on Words WORDS1 148 9.51
   Pouring water POUR1 142 14.87
   The Rise and Fall of Power MARCHA4 128 4.88
   Money Matters MONEY 110 13.68
   Buttons BUTTONS 101 7.76
   XAndOr INSOMA5 84 30.99
   Name Chopping INSOMA4 65 18.52
   Multiples of 3 MULTQ3 54 6.01
   The Sports Stadium STADIUM 52 18.98
   Adding Fractions ADDFRAC 51 14.86
   Stable Marriage Problem STABLEMP 47 24.09
   Domain Dilemma DDILEMMA 45 9.67
   AND Rounds RESN01 44 15.72
   Sphere in a tetrahedron TETRA 40 54.55
   Rotate the String ROTSTRNG 40 10.21
   The LCS Problem Revisited J2 37 25.27
   Pleasing Chief CHIEFETT 37 21.65
   Collect the Chocolate Chips TKCHOCS 36 34.88
   Squirrel and chestnut SQUIRREL 34 14.11
   Help the soldier SOLDIER 33 14.70
   Monitoring Madness MMADNESS 30 7.43
   Tautology TAUT 27 34.85
   Preparing Dishes PREPARE 24 22.50
   Angry Chef - Crispy Chips KCHIPS 24 23.08
   Ciel and Quiz Game CIELQUIZ 22 20.16
   Sum of numbers NUMSUM 21 2.10
   The Matrix Game SNCK01 21 29.59
   Zeta-Nim Game TAKEAWAY 21 44.12
   Squash the Bugs B5 20 13.92
   Logging Game LOGGERS 20 50.00
   Birthday Gift CHEFGIFT 19 27.35
   Just a simple sum H4 18 9.09
   The N Queens Puzzle Revisited J3 18 40.00
   Ripple-Carry Adder RIPPLE 18 20.18
   Fetching Cooking Tools TOOLS 18 28.57
   Bonus ACMKANPB 18 13.92
   Grouping Chefs GROUPING 17 28.28
   Box and Ball System BBSYSTEM 16 22.76
   Kayaks H2 15 15.56
   The Traveling Photographer PHOTOS 15 29.69
   K-Unique Sequence KUNIQUE 15 24.71
   N Knights Problem KNIGHTS 15 33.33
   New Restaurant NEWREST 15 25.81
   Colorful Chain COLCHAIN 15 32.20
   Restore the Recipe RSRECIPE 15 27.78
   Equation Solver EQUATIO 15 26.67
   Soccer League M3 13 13.08
   Bombing BOMBING 13 14.29
   Chess Pushing Game CHESSGM 13 37.78
   Longest Arithmetic Progressions ARITHPR 13 23.08
   Choosing Cook Off Problems COOKOFF 12 21.31
   Ciel and Eggs STREGGS 12 31.65
   Mean Mean Medians MEANMEDI 11 23.96
   Repeated String REPSTR 11 25.42
   Ciel and Battle Arena CIELBTL 11 40.91
   Quadratic Equations E4 10 16.67
   Palindrome Palindrome PALIPALI 10 13.51
   The Grand Cook Off COOKOFF2 10 36.11
   Target Practice TARPRACT 10 14.10
   Lucky Sum LUCKY3 10 60.71
   SudokuX J1 9 19.23
   Careful Calculation CAREFUL 9 36.36
   Lights Off E2 8 38.10
   Closest Ranking VOTING 8 32.26
   Newspaper Puzzle PUZZLES 8 36.36
   Graph on a Plane GRAPLANE 8 23.53
   Remys last tour FALLDOWN 8 33.33
   Battleship V B3 7 15.09
   A Bowling Game G1 7 30.77
   A Coin Game G3 7 18.42
   Head office building BUILDING 7 21.62
   Integer Sequences SEQUENCE 7 31.82
   Restock RESTOCK 7 38.30
   The Postal Service POSTAL 7 26.67
   First non-Palindrome NONPALIN 7 25.00
   Moving between Floors FLOORSMV 7 40.00
   The Cursed Room MMATCH 6 21.21
   An interesting subsequence C5 6 4.46
   The powerful sum C2 6 5.16
   The Lucky Draw D2 6 5.42
   Bytelandian Robots F2 6 22.58
   Maze of Digits K3 6 71.79
   Robot Game TR2 6 25.64
   Trees Again TREES 6 22.58
   The Perfect Chocolate Candy CANDY 6 22.22
   Balanced Walks BALANCED 6 57.14
   Dinner Party Socializing SOCIAL 6 20.00
   Squares Game SQUAGAME 6 14.81
   Time of collisions COLLTIME 6 10.53
   Wireless Network NETWORK 6 28.57
   Menu MENU 5 17.24
   Paragraph Formatting H5 5 17.24
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