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	15784	31.24
ATM	HS08TEST	9707	23.47
Factorial	FCTRL	6432	32.32
Enormous Input Test	INTEST	6114	38.17
Small factorials	FCTRL2	3826	20.43
Odd	DCE05	3456	30.08
Turbo Sort	TSORT	2192	22.17
Transform the Expression	ONP	1879	40.58
Sums in a Triangle	SUMTRIAN	1876	32.81
Ambiguous Permutations	PERMUT2	1575	41.26
The Lead Game	TLG	1393	23.57
Stone Game	RESN04	1250	45.62
Paying up	MARCHA1	1191	33.45
Holes in the text	HOLES	1185	40.49
Yet Another Number Game	NUMGAME	1017	39.43
A Very Easy Problem!	EASYPROB	866	47.66
Nuclear Reactors	NUKES	789	28.32
Prime Palindromes	PRPALIN	735	26.52
Cooling Pies	COOLING	725	42.25
Cleaning Up	CLEANUP	598	48.50
Permutation Cycles	PCYCLE	593	38.38
The Way to a Friends House Is Never Too Long	POINTS	550	20.19
Discrepancies in the Voters List	VOTERS	540	26.49
Birthday Candles	CANDLE	517	22.68
GCD2	GCD2	464	20.13
Johnny and the Beanstalk	MARCHA2	463	23.73
Cutting Recipes	RECIPE	433	51.39
Decreasing String	DECSTR	362	29.99
Not a Triangle	NOTATRI	341	20.25
The Best Box	J7	331	59.69
Poker	POKER	302	29.61
Parenthesis	DCE03	267	25.11
Open the Dragon Scroll	DRAGNXOR	252	52.43
Ciel and A-B Problem	CIELAB	251	51.00
Arranging the Appetizers	ARRANGE	235	47.28
Three Way Communications	COMM3	235	54.01
The White Knight	E1	209	20.93
A Simple Equation	EQUATION	207	20.86
Hotel Bytelandia	HOTEL	206	46.07
Correctness of Knight Move	KNIGHTMV	201	22.90
Popular Rice Recipe	TIDRICE	179	50.71
Number Game Revisited	NUMGAME2	176	59.51
Summing Subsets	RESN05	174	28.02
The Morning Commute	COMMUTE	169	53.79
Internet Media Types	MIME2	153	28.26
Product of divisors	D1	148	6.70
Primality Testing	INSOMB1	139	21.10
Money Transformation	MONTRANS	131	27.72
Distribute idlis Equally	EQIDLIS	127	31.93
Top Batsmen	BESTBATS	125	42.12
Rescue	DCE04	124	30.24
Ciel and New Menu	CIEL8STR	121	20.62
Ciel Numbers II	CIELNUM2	121	19.34
Resistance	RESIST	117	51.30
Misinterpretation	MISINTER	113	54.12
Chef team	CHEFTEAM	107	12.16
Pairing Chefs	PAIRING	104	50.39
Subanagrams	SUBANAGR	103	39.21
Garden Squares	GARDENSQ	100	38.77
Count of Maximum	MAXCOUNT	98	37.78
Sums in a cuboid	CUBESUM	96	39.27
Last Digit Sum	LASTDIG	96	17.38
A New Number System	ACMKANPD	95	24.71
A Prime Conjecture	PRIMES2	89	29.78
Count the squares	D6	87	23.85
Daily Train	DAILY	87	44.94
Palindromic Numbers	K2	80	8.94
Digit Rotation	DIGROT	79	19.07
Collision in Space	COLLIDE	78	22.31
Rational Numbers	SNCK04	77	22.94
Vote for the Noodle Soup	NDLVOTE	76	24.40
Lucky Long	LUCKY5	72	45.70
Double Strings	DOUBLE	72	60.80
Sum of pairs	PAIRSUM	70	12.31
Tree Product	TPRODUCT	67	17.42
Exploding Search	INSOMA2	65	25.21
Fit to Play	PLAYFIT	65	33.44
Make A Square	MKSQR	63	43.60
Little Elephant and Strings	LUCKYSTR	63	49.71
Ciel Numbers I	CIELNUM1	62	29.74
Count palindromes	COUNTPAL	60	37.87
Spoon in Matrix	SPOON	59	31.82
Generalized Arithmetic Progression Free Sequence	GENARSEQ	58	22.89
Moving Coins	MVCOIN	55	41.32
Painting Racing Lanes	RACELANE	53	39.77
Lost Primes	L3	49	25.56
Dish Distribution	DISHDIS	49	23.75
Lucky lucky number	CHEFLUCK	49	56.30
Greatest Dumpling Fight	DUMPLING	48	29.30
One Dimensional Game of Life	LIFE	47	58.43
Socializing Game around Pizza	BIGPIZA	47	37.66
Most Popular Friend	LOKBIL	45	27.12
Nikhils Dungeon	NDUNGEON	42	20.74
Younger Brother	CHEFBRO	42	26.77
BIT Magazine	TRMAG	42	35.33
CEO Ride	INSOMB6	41	17.41
Gravel	SPREAD	41	18.94
Chef Travel Routes	TRAVELER	41	34.81
Jewels and Stones	STONES	41	53.27
Maximal crosses	MAXCROSS	40	28.51

RECENT ACTIVITY: