Codechef - Problems

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

Name	Code	Successful Submissions	Accuracy
Life, the Universe, and Everything	TEST	13751	31.45
ATM	HS08TEST	8286	23.54
Factorial	FCTRL	5683	32.30
Enormous Input Test	INTEST	5300	37.79
Small factorials	FCTRL2	3308	20.03
Odd	DCE05	2902	29.79
Turbo Sort	TSORT	1870	22.03
Transform the Expression	ONP	1705	40.30
Sums in a Triangle	SUMTRIAN	1684	32.28
Ambiguous Permutations	PERMUT2	1366	41.46
The Lead Game	TLG	1181	23.55
Paying up	MARCHA1	1043	33.52
Stone Game	RESN04	1034	45.98
Yet Another Number Game	NUMGAME	877	38.51
Holes in the text	HOLES	842	40.87
A Very Easy Problem!	EASYPROB	737	46.73
Nuclear Reactors	NUKES	671	28.71
Prime Palindromes	PRPALIN	598	25.95
Cooling Pies	COOLING	542	42.56
Permutation Cycles	PCYCLE	519	37.27
The Way to a Friends House Is Never Too Long	POINTS	505	19.83
Discrepancies in the Voters List	VOTERS	483	26.82
Cleaning Up	CLEANUP	475	46.96
Johnny and the Beanstalk	MARCHA2	428	23.51
Birthday Candles	CANDLE	423	23.17
GCD2	GCD2	390	20.02
Cutting Recipes	RECIPE	331	52.11
Not a Triangle	NOTATRI	304	19.83
Decreasing String	DECSTR	288	30.65
Poker	POKER	284	29.30
The Best Box	J7	276	58.47
Parenthesis	DCE03	228	24.25
Arranging the Appetizers	ARRANGE	208	47.06
Open the Dragon Scroll	DRAGNXOR	201	51.09
The White Knight	E1	185	20.65
A Simple Equation	EQUATION	183	20.71
Correctness of Knight Move	KNIGHTMV	178	23.63
Three Way Communications	COMM3	176	54.52
Hotel Bytelandia	HOTEL	158	43.05
Summing Subsets	RESN05	154	28.24
The Morning Commute	COMMUTE	149	54.60
Ciel and A-B Problem	CIELAB	146	51.59
Popular Rice Recipe	TIDRICE	145	51.01
Product of divisors	D1	143	7.18
Primality Testing	INSOMB1	128	20.89
Internet Media Types	MIME2	128	28.54
Number Game Revisited	NUMGAME2	127	58.84
Rescue	DCE04	113	31.24
Ciel and New Menu	CIEL8STR	113	20.89
Distribute idlis Equally	EQIDLIS	111	31.21
Money Transformation	MONTRANS	110	28.17
Misinterpretation	MISINTER	103	52.31
Chef team	CHEFTEAM	99	12.19
Sums in a cuboid	CUBESUM	91	38.86
Pairing Chefs	PAIRING	91	49.06
A New Number System	ACMKANPD	87	25.19
Subanagrams	SUBANAGR	84	39.06
Count the squares	D6	83	20.94
Garden Squares	GARDENSQ	81	36.04
A Prime Conjecture	PRIMES2	78	33.69
Last Digit Sum	LASTDIG	75	19.75
Palindromic Numbers	K2	74	8.88
Rational Numbers	SNCK04	72	22.39
Vote for the Noodle Soup	NDLVOTE	72	24.72
Digit Rotation	DIGROT	69	18.48
Collision in Space	COLLIDE	66	20.50
Exploding Search	INSOMA2	64	25.00
Sum of pairs	PAIRSUM	63	11.75
Make A Square	MKSQR	56	45.14
Tree Product	TPRODUCT	53	17.82
Generalized Arithmetic Progression Free Sequence	GENARSEQ	53	23.17
Count palindromes	COUNTPAL	52	37.31
Moving Coins	MVCOIN	51	42.95
Painting Racing Lanes	RACELANE	48	37.82
Lost Primes	L3	47	26.59
Socializing Game around Pizza	BIGPIZA	46	37.58
Most Popular Friend	LOKBIL	45	27.12
Daily Train	DAILY	44	42.55
One Dimensional Game of Life	LIFE	43	56.47
Nikhils Dungeon	NDUNGEON	41	21.11
Younger Brother	CHEFBRO	41	27.23
Chef Travel Routes	TRAVELER	41	34.81
CEO Ride	INSOMB6	39	17.13
Maximal crosses	MAXCROSS	39	28.26
BIT Magazine	TRMAG	39	34.72
Dish Distribution	DISHDIS	39	20.68
Gravel	SPREAD	37	19.25
Healthy dinner party	C4	35	24.63
The Black and White Knights	BWKNIGHT	35	17.31
Snake Snaky	SNAKY	35	15.62
Packing the Golden Triangles	PACKBAND	34	22.94
Lucky Long	LUCKY5	33	43.88
Count of Maximum	MAXCOUNT	33	42.42
Randomly Testing Circuits	CIRCUITS	32	40.66
A puzzle game	H1	29	25.77
Golf course	F1	28	17.47
Weight of Numbers	WEIGHT	28	44.94
A String Game	ASTRGAME	28	12.68
Chef Teams	CTEAMS	28	29.37
Infinite Grid Game	IGAME	28	32.28

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