Problems

Note that you can solve most task in any order!
Already solved ones are at the bottom of the table.

Tagged with: c-1 - total 345 (clear filter)

Id	Title	Translations	Author	Solved	Blessing
28	Body Mass Index	DE ES ZH RU SK		11318	3.88
13	Weighted sum of digits	DE ES RU ZH SK		10809	3.96
17	Array Checksum	DE ES RU SK		9525	4.18
48	Collatz Sequence	DE ES RU SK		7699	4.55
12	Modulo and time difference	DE ES RU SK		7825	4.52
18	Square Root	ES RU		6215	4.92
29	Sort with Indexes	RU		5924	5.01
50	Palindromes	DE ES RU SK		5482	5.14
52	Pythagorean Theorem	RU		5261	5.21
67	Fibonacci Sequence	RU		4719	5.40
24	Neumann's Random Generator	DE ES RU		5082	5.27
35	Savings Calculator			4498	5.49
104	Triangle Area	ES		3768	5.79
44	Double Dice Roll	RU		4214	5.60
32	Josephus Problem	RU		4318	5.56
81	Bit Count	RU		3785	5.79
19	Matching Brackets	ES RU		4096	5.65
58	Card Names			3621	5.86
49	Rock Paper Scissors			3677	5.84
128	Combinations Counting			2987	6.20
94	Fool's Day 2014	SK		3095	6.13
59	Bulls and Cows			3216	6.07
61	Prime Numbers Generation	RU		3153	6.10
22	Two Printers	ES RU		3413	5.96
42	Blackjack Counting			2936	6.23
120	Selection Sort			2318	6.64
38	Quadratic Equation			2719	6.36
33	Parity Control	RU		2648	6.41
53	King and Queen			2376	6.59
34	Binary Search			2459	6.53
37	Mortgage Calculator	ZH		2304	6.65
45	Cards Shuffling	ZH		2247	6.69
69	Fibonacci Divisibility			2093	6.81
63	Integer Factorization	ZH		2015	6.88
46	Tic-Tac-Toe	ZH		2066	6.84
62	Prime Ranges			1846	7.03
121	Insertion Sort			1552	7.33
75	Yacht or Dice Poker			1689	7.19
172	Cloud Altitude Measurement			1262	7.69
39	Share Price Volatility			1728	7.15
127	Anagrams			1366	7.55
134	Flying Text Screensaver			1281	7.67
156	Luhn Algorithm	SK		1131	7.88
80	Duel Chances			1296	7.65
36	Code Guesser	UA		1385	7.53
74	Clock Hands			1220	7.75
135	Variable Length Code			1010	8.08
54	Pythagorean Triples			1204	7.77
105	Convex Polygon Area			1049	8.01
73	Hexagonal Grid			1083	7.96
97	Girls and Pigs			961	8.17
116	Summing Up			868	8.34
181	Reverse Polish Notation			680	8.77
98	Azimuth at Treasure Island			837	8.41
122	QuickSort			776	8.54
51	Dungeons and Dragons Dice	UA		916	8.25
85	Rotation in 2D Space			837	8.41
40	Paths in the Grid	UA		927	8.23
56	Life is Simple			875	8.33
66	Caesar Cipher Cracker			797	8.49
70	Most Frequent Word			789	8.51
88	Pitch and Notes			740	8.62
87	Tree Builder			707	8.70
60	Sweet Harvest			732	8.64
108	Star Medals			652	8.84
95	Simple Linear Regression			663	8.81
77	Point to Segment Distance			673	8.78
71	Fibonacci Divisibility Advanced			632	8.89
211	Information Entropy			423	9.59
91	Game of 2048			591	9.01
207	Suffix Array			416	9.62
101	Gradient Calculation			547	9.14
143	Extended Euclidean Algorithm			480	9.37
82	Levenshtein Distance			558	9.11
191	Spaceship Weight Fraud			401	9.68
154	Breadth First Search			438	9.53
89	Instrument Tuner			517	9.24
206	Base-32 Encoding			369	9.83
119	Brain Fibo			476	9.38
64	Maze Pathfinder			542	9.16
79	Cycles Detection			515	9.25
92	Binary Heap			474	9.39
155	Depth First Search			393	9.72
83	Graph Generator			473	9.39
131	Four Pics One Word			412	9.63
136	Variable Length Code Unpack			374	9.80
78	Bezier Curves			433	9.55
90	Lexicographic Permutations			419	9.61
150	Introducing Regexps			350	9.92
65	Transitive Closure on Candy States			434	9.54
189	Dynamic Web Page			308	10.14
126	Sequence of Squares			370	9.82
385	Number of steps in Euclidean Algorithm		gardengnome	110	11.92
476	Prime Vowel Count		csfpython	22	14.65
167	Copy Line			315	10.10
170	Binary Search in Array			309	10.13
99	Uphill Shooting			368	9.83
161	Topological Sorting			310	10.13
197	Loops in Assembly			272	10.35
117	Divide by Two			342	9.96
377	Sum of Digits Divisibility			109	11.93
144	Modular Inverse			312	10.12
76	Pawn Move Validator			349	9.92
174	Calculation of Pi			268	10.38
93	Starving Priority Queue			326	10.04
133	Billiard Ball			291	10.24
96	Snake Arcade			313	10.11
140	Proper Bracket Sequences			277	10.32
165	Safe Landing			255	10.47
84	Dijkstra in the Network			303	10.17
123	Knapsack of Integers			274	10.34
130	Combinations with Repetitions			255	10.47
173	Chords of Music			225	10.68
444	White Rectangle			37	13.78
472	Unreachable Amounts		csfpython	18	14.98
125	Bogosort			253	10.48
190	Query String Parameters			208	10.82
323	Next Palindrome		csfpython	113	11.87
146	Color Cubes			220	10.72
129	Enumerating Combinations			226	10.67
151	Word Ladders			203	10.86
433	A Crime on Logic Island		csfpython	38	13.73
164	Page Rank			194	10.94
253	Beautiful Line Chart			142	11.48
139	Beam Balance and Masses			207	10.83
208	Neighborhood of a String			167	11.20
360	Whisky Blending		csfpython	79	12.49
138	Huffman Coding			201	10.88
194	Convex Hull and Farmers			167	11.20
201	Point in Polygon			161	11.26
337	Introducing Zeckendorf		csfpython	87	12.32
152	RSA Cryptography			183	11.04
111	Necklace Count			203	10.86
137	Shannon-Fano Coding			186	11.01
102	Travelling Salesman			204	10.85
496	Minimum Journey Cost		csfpython	1	18.89
110	Lucky Tickets Advanced			194	10.94
192	Gangster Battles			150	11.38
269	Fibonacci coding			112	11.89
399	Methane Identification		moxieman	48	13.34
199	Employees Web App			142	11.48
148	Public Key Cryptography Intro			156	11.31
106	Random Search Optimization			172	11.15
124	Knapsack Backtracking			164	11.23
162	Rubik's Cube			142	11.48
202	Dancing Pairs			125	11.70
168	Caesar meets BF			138	11.53
449	Space Pirates		csfpython	20	14.81
179	Look and Say binary			130	11.63
182	Frodo and Black Riders			123	11.72
198	Prn Hex Str			113	11.87
258	Text Justification			89	12.28
177	Nim Game			119	11.78
160	Social Web Scraper			125	11.70
158	Hamming Codes			125	11.70
185	Simple 3D Scene			113	11.87
359	Find 3 Numbers		csfpython	50	13.27
157	Emirp primE			123	11.72
459	Number String Multiples of Thirteen		csfpython	13	15.51
372	String Minimization			42	13.56
159	Hard Life			111	11.90
100	Crossing the Road			130	11.63
153	Fermat goes hacking RSA			112	11.89
463	Crossing Towns		csfpython	11	15.78
291	Squirrels vs. Acorns		zelevin	65	12.82
281	Basic Tokenizer			68	12.74
411	Elo Ratings		moxieman	27	14.31
115	Gradient Descent for SLE			119	11.78
384	Equal Hamming Distance		csfpython	35	13.87
277	The Adventure of Morse Code		zelevin	67	12.77
141	Sliding Window Search			107	11.96
460	Carlsdale Caverns		csfpython	11	15.78
112	Travelling Salesman Inverted			114	11.86
196	Fibonacci Randomizer			89	12.28
186	Simple 3D Scene (cont)			91	12.24
469	Game of Generals			8	16.28
427	Cheapest Bus Tickets			20	14.81
193	Maximum Flow			87	12.32
458	Mountain Panorama		csfpython	11	15.78
166	Page Rank as Eigenvector			94	12.19
210	Ticket Puzzle			81	12.44
142	LZ77 decompression			100	12.08
209	Suffix Array Advanced			79	12.49
434	A Crime on Logic Island Advanced		csfpython	17	15.08
113	Ground Zero			104	12.01
274	Two Buckets			60	12.96
203	Tic-Tac-Toe Minimax Algorithm			78	12.51
216	Cracking Linear Congruential Generator			74	12.60
219	Neural Network Calculation			72	12.64
457	Railroad and Hamilton			10	15.93
464	Graph to Loops Decomposition			8	16.28
107	Knight's Tour			97	12.13
351	Nicomachus			36	13.83
132	Stream Cipher Breaking			89	12.28
381	Finding Squares		csfpython	28	14.25
467	Permutation Generator		csfpython	7	16.49
400	Memory Check			23	14.58
241	Village Ways			61	12.93
163	Colliding Balls			79	12.49
175	Algae Robot			74	12.60
205	Clustering the Stars			65	12.82
406	Wormholes of Cygnus		moxieman	20	14.81
230	Move-To-Front Transform			58	13.01
335	Venus Visible			35	13.87
445	Formula 1			11	15.78
334	Find all of the SETs		csfpython	35	13.87
412	Json Fix			18	14.98
407	River Labyrinth			19	14.89
218	Rain Must Fall	DE		58	13.01
255	LCM of a range			50	13.27
442	Chomp			11	15.78
204	Wandering Star			60	12.96
446	Hangman			10	15.93
421	Princess and Tiger			15	15.28
390	Card Pairing Solitaire			21	14.73
435	Maze Mapping API-Robot			12	15.64
200	Fizz Buzz in Asm			59	12.99
149	Prime Chains			67	12.77
212	BCD to Hex			54	13.14
257	Missing Records in SQL			45	13.45
233	Language Study			49	13.30
118	Maxit Single-Player			70	12.69
423	Russian Dolls		csfpython	13	15.51
307	The Problem of Too Many Clues		zelevin	34	13.92
450	Bead Games		csfpython	8	16.28
180	Simple Game of Sticks			56	13.07
223	Introducing Scheme			48	13.34
247	Towers of Hanoi			43	13.52
379	Dice with Infinity Sides		telebashna	20	14.81
147	Color Cubes Advanced			60	12.96
178	Maze of the Wumpus			54	13.14
440	Mud Walker			9	16.10
229	Burrows-Wheeler Transform			44	13.49
439	Power Sum of Digits		csfpython	9	16.10
451	Maximize Toy Production		csfpython	7	16.49
420	Life on a String		csfpython	12	15.64
426	Weighted Sum of Digits 2		csfpython	11	15.78
376	Cartesian Tree Visualization			19	14.89
299	Tree Visualizer			30	14.13
357	Ulam's Prime Spiral			21	14.73
347	Unwanted Multiples		csfpython	22	14.65
183	Connect Four			46	13.41
338	Throwing Easter Eggs		gardengnome	23	14.58
270	Hexlife			33	13.97
354	Too Many Divisors		csfpython	20	14.81
409	Election Fever		csfpython	12	15.64
349	Burrows		gardengnome	20	14.81
284	Rotate Array In-Place			29	14.19
362	Euclid, Manhattan and Chebyshev			18	14.98
405	Three Friendly Knights		csfpython	12	15.64
234	Train Merge			35	13.87
455	D flip-flop			5	16.99
256	Rook Jump Maze			31	14.08
286	Self-Printing Program			27	14.31
454	Multiplexer 4x4			5	16.99
339	Parking Lot			20	14.81
392	Fixing an Anagram			13	15.51
415	Smallest Message		gardengnome	10	15.93
243	Grille Encryption			32	14.02
238	Bear Hunt			32	14.02
268	Logic Transformation			28	14.25
340	Zeckendorf Lite		csfpython	19	14.89
217	Personality Swap			34	13.92
393	Urban Planning		csfpython	12	15.64
417	Unfortunate Bubble Sort		gardengnome	9	16.10
367	Roguelike 1d			15	15.28
169	Automated Landing			38	13.73
432	Ball Bearing Collisions		csfpython	7	16.49
361	Rogue Mazes			15	15.28
395	Growth of Micro-Organisms		csfpython	11	15.78
295	Vigenere Cipher Cracker			22	14.65
275	Three Buckets			24	14.51
382	Die Throw Sequences		csfpython	12	15.64
363	Language Detector			14	15.39
408	Mad Beaver in River Labyrinth			9	16.10
398	Collecting Diamonds		csfpython	10	15.93
285	Rotate Matrix In Place			22	14.65
462	Rota Boards		csfpython	3	17.69
271	A Knight some Trolls and a Princess		csfpython	23	14.58
344	Throwing Easter Eggs Part 2		gardengnome	15	15.28
383	E2C2S - try harder!		gardengnome	11	15.78
260	Low Cost Road Network		csfpython	23	14.58
470	Shogi Engine			2	18.19
419	Special Digits		csfpython	7	16.49
358	Mandelbrot Set			13	15.51
341	Zeckendorf Advanced		csfpython	14	15.39
424	New Towers of Hanoi		csfpython	6	16.72
413	Tree Painting		csfpython	7	16.49
402	Game of Stones		csfpython	8	16.28
456	Every Third Bit			3	17.69
220	Neural Network Training			24	14.51
213	Micro-Life	SK		24	14.51
222	Easter Eggs Advanced			23	14.58
266	Pancake Sorting			19	14.89
336	Currency Arbitrage			13	15.51
416	Socket Server		testuser	6	16.72
404	Methane Normalization		moxieman	7	16.49
254	Rule 30 by Turing			19	14.89
263	Easter Bunnies 3D		gardengnome	18	14.98
262	Easter Bunnies 2D Advanced		gardengnome	18	14.98
221	XWords		quandray	21	14.73
410	Village Door Shuffle		csfpython	6	16.72
422	Mabinogion Sheep		moxieman	5	16.99
235	Train Merge Advanced			19	14.89
380	Treap Study			8	16.28
391	Scout Proficiency Badges		csfpython	7	16.49
267	Turing Maze			16	15.18
279	Two Buckets Advanced		csfpython	15	15.28
306	Line Drawing Algorithm			13	15.51
333	Happy Triplets			11	15.78
430	Cutting Paper		csfpython	4	17.30
345	Elliptic Curves Basics			10	15.93
342	Adaptive Arithmetic Coding			10	15.93
369	Flappy Bird			8	16.28
264	Party Presents		csfpython	15	15.28
365	Flower Border Arrangements		csfpython	8	16.28
224	Transposing List of Lists			17	15.08
237	Road Network Destruction			16	15.18
227	Hashtable Implementation			16	15.18
397	Trading Bot			5	16.99
327	Dobbin's Long Journey		csfpython	9	16.10
378	Space Invaders Automation			6	16.72
302	Sound-Controlled Robot			10	15.93
373	Railroad Rat		csfpython	6	16.72
225	Hamurabi			14	15.39
252	Shadok and Gibis			12	15.64
328	Beep Beep Beep			8	16.28
308	Circle Drawing Algorithm			9	16.10
215	Klotski	SK		13	15.51
251	Radio Spies			11	15.78
370	Jewels			5	16.99
280	Three Buckets Re-visited		csfpython	9	16.10
273	Logic Glitches			9	16.10
226	Multiplicative Persistence Backtrace			11	15.78
236	Is the Earth Flat			10	15.93
232	Shift Register Randomizer			10	15.93
248	Christmas Puzzle			9	16.10
348	Trick-Taking Game			5	16.99
396	Chocolate Triangles and BF		moxieman	3	17.69
240	Playfair Cipher Cracking			9	16.10
355	Robots Game			4	17.30
228	Maze Mapping Robot			8	16.28
317	Launch to Orbit			5	16.99
356	Robots Game Autoplay			3	17.69
318	Launch to Orbit automated			2	18.19