Home » Practice

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

Previous 1  2 Next >
Name Code Successful Submissions Accuracy
   Ordering the Soldiers ORDERS 157 6.13
   Team Selection TEAMSEL 84 3.71
   Some More Homework MARCHA6 31 27.21
   Primes in the GCD table D4 27 8.78
   XOR Rounds RESN02 26 13.93
   The Guessing Game MARCHA3 22 15.92
   Swapping mismatches C1 21 4.72
   Authentication Failed AUTHEN 19 23.38
   Divide and conquer F6 17 32.56
   Travelling Salesman Again ! TSPAGAIN 16 60.94
   Highways HIGH 13 15.79
   Johny the farmer E3 12 12.50
   Permutation Jumping RESN03 12 53.85
   Baking Cupcakes MUFFINS 12 12.12
   Bytelandian Shoppers BYTESHOP 12 32.43
   Bears and Bees BEARS 12 38.71
   Congruent triangles H3 11 19.77
   Traffic jam N5 11 7.79
   Tidying Posters POSTERS 11 48.57
   Haunted Maze HAUNTED 11 25.00
   Se7en F4 10 2.71
   Digits Forest DIGFORST 10 20.65
   Reaching the Rig REACHRIG 9 4.96
   Sine Partition Function PARSIN 9 47.62
   Card Shuffle CARDSHUF 9 10.00
   Substrings on a Tree TSUBSTR 9 22.73
   Buggy algorithm E5 8 57.14
   Milestones MSTONES 8 21.15
   Lights Out DORADM01 6 37.50
   Reduce string STREDUC 6 8.20
   Adding Least Common Multiples LCM 6 8.43
   Backup Functions FUNCTION 6 25.00
   Product of Digits DIGITS 6 7.83
   The Hungry Bear HBEAR 6 24.14
   Ski Resort SKIRES 6 23.53
   Pruning Trees PRUNING 6 58.62
   Sines Sum Queries SINSUMQ 6 9.68
   Motorbike Racing M2 5 25.00
   The Reversed World REVERSED 5 9.46
   Genetics GENETICS 5 16.90
   Rearranging Digits ARRANGE2 5 7.27
   Little Elephant and Boxes LEBOXES 5 45.45
   Magic Strings J5 4 17.65
   Help the judge J6 4 36.67
   Graph Counting GRAPHCT 4 28.57
   Renting Spare Oven Time OVENTIME 4 19.44
   Product of Digits Again DIGITS2 4 38.46
   Sum Divides Product PRDIVSUM 4 4.35
   Coloring in Hypercube HPARITY 4 41.67
   D-Power Permutations DPOWPERM 4 12.90
   Short SHORT 4 22.67
   Can you do it better CYDB 4 6.78
   Alien language G4 3 7.50
   Chemical reactions G5 3 25.00
   Alternating Permutations SNCK03 3 27.27
   The Mine Field M1 3 33.33
   Wildcard Matching L2 3 21.51
   Generalized Independent Sets GENIND 3 40.00
   Exponentiation Commutativity EXPCOMM 3 16.67
   Preferred Cooking Schools CKSCHOOL 3 18.52
   Something About Divisors DIVISORS 3 15.00
   Misinterpretation 2 MISINT2 3 18.75
   Ciel and Random Walk CIELWALK 3 10.71
   Find a Subsequence FINDSEQ 3 10.00
   Ciel and Earthquake CIELQUAK 3 19.05
   Find a special connected block CONNECT 3 11.11
   The Bytelandian Union A8 2 3.51
   Toll Trolls M4 2 22.22
   Box Packers INSOMB4 2 22.22
   Falling Snow INSOMB8 2 42.86
   Alien Clock D7 2 13.04
   Effective Sets J4 2 6.06
   Powerful Strongholds SNCK02 2 28.57
   Place the balloon L5 2 16.67
   Heroes of Magical Might N2 2 66.67
   Generalized Spanning Trees GST 2 11.11
   Communicating Servers SERVERS 2 21.43
   Escape The Ruins ESCAPE 2 66.67
   Even Coefficients EVENPOLY 2 100.00
   Buying Land BUYLAND 2 31.25
   Attack of the Clones CLONES 2 20.00
   Minesweeper Reversed MINESREV 2 5.13
   Billboards BB 2 50.00
   Yet Another Sequence YASEQ 2 40.00
   Short II SHORT2 2 25.00
   Hypertrees HYPER 2 40.00
   Lucky Days LUCKYDAY 2 5.71
   Lame Queen Game LAMQUGAM 2 16.67
   Packing the Boxes A5 1 2.78
   A Christmas Pizza Puzzle A7 1 17.86
   Get a Clue CLUE 1 50.00
   Stepping Numbers STEPNUMS 1 1.92
   Algebra Express ACMKANPE 1 16.67
   Rush Hour RUSHHOUR 1 16.67
   Chef attic window WINDOW 1 9.68
   Divisors number divisibility DIVNODIV 1 4.44
   Colored Domino Tilings and Cuts DOMNOCUT 1 20.00
   Counting Hexagons CNTHEX 1 20.00
   Evil Book EVILBOOK 1 66.67
   Ciel and Communications System CIELWEB 1 16.67
Previous 1  2 Next >

RECENT ACTIVITY:

Loading Recent Activity for submissions...