No such tag

Problems

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

Volume:

Simple Implementation Algorithms Puzzles Special

all tags

Id	Title	Translations	Author	Solved	Blessing
1	Sum "A+B"	DE ES FR AR ZH RO RU SK		59736	1.00
2	Sum in Loop	DE ES FR AR ZH RO RU SK		36209	1.87
3	Sums in Loop	DE ES FR AR ZH RO RU SK		27612	2.34
4	Minimum of Two	DE ES FR AR ZH RO RU SK		24065	2.58
5	Minimum of Three	DE ES FR AR ZH RO RU SK		21544	2.77
15	Maximum of array	DE ES AR ZH RO RU SK		18830	3.01
6	Rounding	DE ES AR ZH RO RU SK		17261	3.16
7	Fahrenheit to Celsius	DE ES AR ZH RO RU SK		16532	3.23
20	Vowel Count	DE ES AR ZH RO RU SK		13436	3.59
11	Sum of digits	DE ES RU ZH SK		13368	3.60
8	Arithmetic Progression	DE ES RU ZH SK		12555	3.71
41	Median of Three	DE ES AR ZH RO RU SK		11494	3.86
9	Triangles	DE ES RU ZH SK		11995	3.79
28	Body Mass Index	DE ES ZH RU SK		11367	3.88
13	Weighted sum of digits	DE ES RU ZH SK		10844	3.96
43	Dice Rolling	DE ES ZH RU SK		9762	4.15
16	Average of an array	DE ES RU SK		10286	4.06
30	Reverse String	DE ES RU SK		9720	4.15
17	Array Checksum	DE ES RU SK		9564	4.18
21	Array Counters	DE ES RU SK		8897	4.31
10	Linear Function	DE ES RU SK		8653	4.36
48	Collatz Sequence	DE ES RU SK		7726	4.55
12	Modulo and time difference	DE ES RU SK		7857	4.52
14	Modular Calculator	ES SK		7264	4.66
27	Bubble Sort	ES RU SK		6585	4.83
26	Greatest Common Divisor	ES SK RU		6410	4.88
18	Square Root	ES RU		6242	4.92
29	Sort with Indexes	RU		5947	5.01
50	Palindromes	DE ES RU SK		5503	5.14
23	Bubble in Array	ES RU		5702	5.08
52	Pythagorean Theorem	RU		5281	5.21
31	Rotate String	ES RU		5455	5.16
67	Fibonacci Sequence	RU		4744	5.40
68	Bicycle Race	ES RU		4710	5.41
24	Neumann's Random Generator	DE ES RU		5105	5.27
57	Smoothing the Weather	ES RU		4702	5.42
35	Savings Calculator			4517	5.49
104	Triangle Area	ES		3782	5.79
25	Linear Congruential Generator	RU		4462	5.51
32	Josephus Problem	RU		4353	5.55
44	Double Dice Roll	RU		4228	5.60
81	Bit Count	RU		3795	5.79
19	Matching Brackets	ES RU		4111	5.65
58	Card Names			3631	5.86
49	Rock Paper Scissors			3692	5.84
47	Caesar Shift Cipher	SK		3699	5.83
128	Combinations Counting			2994	6.20
55	Matching Words			3550	5.90
94	Fool's Day 2014	SK		3105	6.14
59	Bulls and Cows			3225	6.07
61	Prime Numbers Generation	RU		3171	6.10
22	Two Printers	ES RU		3432	5.96
42	Blackjack Counting			2948	6.23
120	Selection Sort			2330	6.63
38	Quadratic Equation			2729	6.36
33	Parity Control	RU		2661	6.40
53	King and Queen			2381	6.60
34	Binary Search			2468	6.53
171	Tree Height Measurement			1669	7.21
37	Mortgage Calculator	ZH		2310	6.65
45	Cards Shuffling	ZH		2254	6.69
69	Fibonacci Divisibility			2101	6.81
63	Integer Factorization	ZH		2024	6.88
46	Tic-Tac-Toe	ZH		2075	6.84
62	Prime Ranges			1852	7.03
72	Funny Words Generator			1794	7.09
121	Insertion Sort			1553	7.34
75	Yacht or Dice Poker			1693	7.19
172	Cloud Altitude Measurement			1266	7.69
39	Share Price Volatility			1735	7.15
127	Anagrams			1367	7.56
134	Flying Text Screensaver			1284	7.67
156	Luhn Algorithm	SK		1132	7.89
80	Duel Chances			1301	7.65
114	Tricky Printing			1196	7.79
36	Code Guesser	UA		1393	7.53
74	Clock Hands			1224	7.75
135	Variable Length Code			1013	8.08
54	Pythagorean Triples			1209	7.77
105	Convex Polygon Area			1050	8.02
73	Hexagonal Grid			1087	7.96
145	Modular Exponentiation			892	8.30
97	Girls and Pigs			966	8.16
116	Summing Up			874	8.34
181	Reverse Polish Notation			682	8.77
98	Azimuth at Treasure Island			839	8.41
122	QuickSort			779	8.54
51	Dungeons and Dragons Dice	UA		921	8.25
502	Chessboard			13	15.52
40	Paths in the Grid	UA		932	8.23
85	Rotation in 2D Space			840	8.41
56	Life is Simple			877	8.33
187	Static Web Page			616	8.94
188	Basics of HTML			587	9.03
66	Caesar Cipher Cracker			802	8.49
70	Most Frequent Word			793	8.51
88	Pitch and Notes			743	8.62
87	Tree Builder			711	8.70
60	Sweet Harvest			737	8.63
108	Star Medals			656	8.83
95	Simple Linear Regression			666	8.81
504	Who are Backus and Naur			7	16.49
77	Point to Segment Distance			674	8.79
507	Ticket Price Total		csfpython	2	18.20
71	Fibonacci Divisibility Advanced			638	8.88
86	Brainfuck Interpreter			616	8.94
211	Information Entropy			426	9.58
91	Game of 2048			595	9.00
428	Broken Keyboard			113	11.88
207	Suffix Array			417	9.62
101	Gradient Calculation			548	9.15
143	Extended Euclidean Algorithm			483	9.37
82	Levenshtein Distance			560	9.11
176	Say 100			428	9.58
191	Spaceship Weight Fraud			402	9.68
89	Instrument Tuner			521	9.23
154	Breadth First Search			439	9.53
119	Brain Fibo			480	9.38
206	Base-32 Encoding			371	9.82
64	Maze Pathfinder			544	9.16
79	Cycles Detection			518	9.24
195	Mul Two			374	9.81
92	Binary Heap			477	9.39
83	Graph Generator			477	9.39
155	Depth First Search			393	9.72
131	Four Pics One Word			413	9.64
301	Skyscraper Price			217	10.75
136	Variable Length Code Unpack			377	9.80
90	Lexicographic Permutations			423	9.60
78	Bezier Curves			435	9.55
505	Building Bridges		csfpython	3	17.70
506	A Strange Prime Function		csfpython	2	18.20
508	Black and White Squares		csfpython	-	20.10
65	Transitive Closure on Candy States			437	9.54
150	Introducing Regexps			352	9.91
126	Sequence of Squares			372	9.82
189	Dynamic Web Page			309	10.14
167	Copy Line			320	10.08
480	Coin Payments		csfpython	26	14.38
170	Binary Search in Array			311	10.13
385	Number of steps in Euclidean Algorithm		gardengnome	113	11.88
99	Uphill Shooting			369	9.83
161	Topological Sorting			311	10.13
117	Divide by Two			344	9.95
197	Loops in Assembly			273	10.35
144	Modular Inverse			315	10.11
377	Sum of Digits Divisibility			112	11.89
503	Dodecahedral Life			4	17.31
76	Pawn Move Validator			350	9.92
174	Calculation of Pi			269	10.38
93	Starving Priority Queue			329	10.03
425	Explosive Breeding			65	12.83
133	Billiard Ball			291	10.24
429	Moving Average in Time			61	12.94
96	Snake Arcade			315	10.11
140	Proper Bracket Sequences			279	10.32
165	Safe Landing			255	10.47
184	Matches Picking		quandray	236	10.61
103	Easter Eggs			294	10.23
84	Dijkstra in the Network			305	10.16
123	Knapsack of Integers			276	10.34
495	Counting Arithmetic Progressions		csfpython	9	16.10
461	Lucky 7		csfpython	33	13.98
485	Magic 3		csfpython	16	15.18
476	Prime Vowel Count		csfpython	22	14.66
109	Lucky Tickets			272	10.36
173	Chords of Music			228	10.67
130	Combinations with Repetitions			256	10.47
125	Bogosort			254	10.48
190	Query String Parameters			209	10.82
366	Image Cutting		oezguery	90	12.27
323	Next Palindrome		csfpython	115	11.85
444	White Rectangle			39	13.70
146	Color Cubes			221	10.72
129	Enumerating Combinations			227	10.67
371	Pages to Print			81	12.45
487	Reduce and Equalise		csfpython	12	15.65
253	Beautiful Line Chart			146	11.44
151	Word Ladders			204	10.86
164	Page Rank			195	10.94
139	Beam Balance and Masses			208	10.82
208	Neighborhood of a String			168	11.19
138	Huffman Coding			204	10.86
360	Whisky Blending		csfpython	80	12.47
437	Elections and Happiness			38	13.74
194	Convex Hull and Farmers			168	11.19
374	Longest Common Subsequence			71	12.68
201	Point in Polygon			162	11.26
433	A Crime on Logic Island		csfpython	39	13.70
152	RSA Cryptography			185	11.03
337	Introducing Zeckendorf		csfpython	88	12.31
111	Necklace Count			204	10.86
472	Unreachable Amounts		csfpython	18	14.99
137	Shannon-Fano Coding			189	10.99
102	Travelling Salesman			205	10.85
481	Field Trip		csfpython	13	15.52
501	Moving Stones		csfpython	3	17.70
471	Missing Digits		csfpython	18	14.99
110	Lucky Tickets Advanced			196	10.93
192	Gangster Battles			153	11.35
269	Fibonacci coding			114	11.86
244	Introducing SQL			124	11.72
494	Holiday Travel		csfpython	6	16.72
199	Employees Web App			143	11.47
399	Methane Identification		moxieman	50	13.27
329	Roman Arithmetic		csfpython	81	12.45
368	Number Base Palindrome		csfpython	63	12.88
148	Public Key Cryptography Intro			157	11.31
106	Random Search Optimization			173	11.14
124	Knapsack Backtracking			165	11.22
294	Vigenere Cipher			89	12.29
162	Rubik's Cube			144	11.46
468	The Garden of Words		zelevin	16	15.18
202	Dancing Pairs			126	11.69
245	Aggregations in SQL			108	11.96
168	Caesar meets BF			139	11.52
214	Sick Travellers			119	11.79
484	A Message from Deep Space		csfpython	9	16.10
489	TV Charity Fundraiser		csfpython	7	16.49
179	Look and Say binary			131	11.62
414	MIDI Variable Length Numbers			36	13.83
182	Frodo and Black Riders			125	11.70
449	Space Pirates		csfpython	21	14.74
198	Prn Hex Str			113	11.88
364	Arthur Engel's Randomizer			52	13.21
158	Hamming Codes			127	11.68
177	Nim Game			120	11.77
160	Social Web Scraper			126	11.69
258	Text Justification			90	12.27
246	Joins in SQL			94	12.19
157	Emirp primE			125	11.70
359	Find 3 Numbers		csfpython	52	13.21
492	Fastest Clearance		csfpython	5	16.99
185	Simple 3D Scene			113	11.88
500	Enchanted Necklace		csfpython	2	18.20
418	Expected Number of Random Moves		moxieman	29	14.20
100	Crossing the Road			133	11.60
159	Hard Life			112	11.89
478	Robot Deliveries		csfpython	9	16.10
372	String Minimization			43	13.53
153	Fermat goes hacking RSA			113	11.88
281	Basic Tokenizer			72	12.65
291	Squirrels vs. Acorns		zelevin	68	12.75
490	Circuit Board Connections		csfpython	5	16.99
401	Methane Rotation		moxieman	33	13.98
493	Ternary Logic			4	17.31
496	Minimum Journey Cost		csfpython	3	17.70
115	Gradient Descent for SLE			120	11.77
411	Elo Ratings		moxieman	29	14.20
265	Update in SQL			73	12.63
499	Binary Frog		csfpython	2	18.20
277	The Adventure of Morse Code		zelevin	68	12.75
324	Merge Sort			54	13.14
482	SS Numbers		csfpython	7	16.49
141	Sliding Window Search			108	11.96
384	Equal Hamming Distance		csfpython	36	13.83
112	Travelling Salesman Inverted			115	11.85
196	Fibonacci Randomizer			89	12.29
488	Accurate Curve Fitting		csfpython	5	16.99
186	Simple 3D Scene (cont)			91	12.25
210	Ticket Puzzle			83	12.41
142	LZ77 decompression			102	12.05
459	Number String Multiples of Thirteen		csfpython	13	15.52
193	Maximum Flow			87	12.33
166	Page Rank as Eigenvector			94	12.19
447	Fixed Product, Minimum Sum		csfpython	16	15.18
498	Sum of Divisors Chaining			2	18.20
209	Suffix Array Advanced			79	12.49
113	Ground Zero			104	12.02
274	Two Buckets			61	12.94
463	Crossing Towns		csfpython	11	15.79
216	Cracking Linear Congruential Generator			75	12.58
203	Tic-Tac-Toe Minimax Algorithm			78	12.51
427	Cheapest Bus Tickets			20	14.82
466	Dictionary Entries		csfpython	10	15.94
434	A Crime on Logic Island Advanced		csfpython	18	14.99
219	Neural Network Calculation			72	12.65
497	Crazy Timer			2	18.20
107	Knight's Tour			99	12.10
259	Easter Bunnies		gardengnome	61	12.94
351	Nicomachus			38	13.74
452	Implication in Logic			13	15.52
403	Hi-Lo dice game			25	14.45
460	Carlsdale Caverns		csfpython	11	15.79
381	Finding Squares		csfpython	30	14.14
132	Stream Cipher Breaking			90	12.27
458	Mountain Panorama		csfpython	11	15.79
241	Village Ways			62	12.91
163	Colliding Balls			79	12.49
400	Memory Check			24	14.51
293	Sums of Triplets			48	13.34
469	Game of Generals			8	16.29
175	Algae Robot			74	12.60
491	Lucky Number Scores		csfpython	3	17.70
477	Lottery Balls		csfpython	6	16.72
230	Move-To-Front Transform			60	12.96
205	Clustering the Stars			65	12.83
407	River Labyrinth			21	14.74
406	Wormholes of Cygnus		moxieman	21	14.74
457	Railroad and Hamilton			10	15.94
334	Find all of the SETs		csfpython	36	13.83
335	Venus Visible			35	13.88
218	Rain Must Fall	DE		59	12.99
412	Json Fix			19	14.90
475	Medieval Medicine		zelevin	6	16.72
204	Wandering Star			61	12.94
315	Count the Common Factors		csfpython	38	13.74
255	LCM of a range			50	13.27
464	Graph to Loops Decomposition			8	16.29
474	Reachable Amounts		gardengnome	6	16.72
292	Factorial Trailing Zeroes			42	13.57
200	Fizz Buzz in Asm			59	12.99
390	Card Pairing Solitaire			22	14.66
421	Princess and Tiger			16	15.18
149	Prime Chains			68	12.75
467	Permutation Generator		csfpython	7	16.49
445	Formula 1			11	15.79
257	Missing Records in SQL			46	13.42
212	BCD to Hex			54	13.14
118	Maxit Single-Player			71	12.68
307	The Problem of Too Many Clues		zelevin	36	13.83
233	Language Study			49	13.31
442	Chomp			11	15.79
453	SR latch			9	16.10
223	Introducing Scheme			50	13.27
379	Dice with Infinity Sides		telebashna	22	14.66
435	Maze Mapping API-Robot			12	15.65
446	Hangman			10	15.94
423	Russian Dolls		csfpython	14	15.40
486	Two Colour Special Nim		csfpython	3	17.70
388	Fibonacci Guessing Game			20	14.82
180	Simple Game of Sticks			56	13.08
147	Color Cubes Advanced			61	12.94
438	Maze Generator			11	15.79
420	Life on a String		csfpython	14	15.40
247	Towers of Hanoi			43	13.53
473	Skittles		csfpython	5	16.99
178	Maze of the Wumpus			54	13.14
436	Avoid the Grid Points		csfpython	11	15.79
229	Burrows-Wheeler Transform			45	13.45
376	Cartesian Tree Visualization			20	14.82
483	Sixes and Sevens		csfpython	3	17.70
450	Bead Games		csfpython	8	16.29
299	Tree Visualizer			31	14.08
270	Hexlife			34	13.93
392	Fixing an Anagram			16	15.18
440	Mud Walker			9	16.10
357	Ulam's Prime Spiral			21	14.74
426	Weighted Sum of Digits 2		csfpython	11	15.79
183	Connect Four			46	13.42
439	Power Sum of Digits		csfpython	9	16.10
347	Unwanted Multiples		csfpython	22	14.66
389	Binary Split Guessing Game		csfpython	16	15.18
338	Throwing Easter Eggs		gardengnome	23	14.58
352	Hurkle			21	14.74
409	Election Fever		csfpython	13	15.52
330	Easter Bunnies Are Back		gardengnome	24	14.51
451	Maximize Toy Production		csfpython	7	16.49
284	Rotate Array In-Place			30	14.14
297	Collatz in the Range			28	14.26
465	Red Blue Hackenbush		csfpython	5	16.99
354	Too Many Divisors		csfpython	20	14.82
405	Three Friendly Knights		csfpython	13	15.52
234	Train Merge			36	13.83
296	Tree Value	RU	csfpython	27	14.32
349	Burrows		gardengnome	20	14.82
256	Rook Jump Maze			32	14.03
417	Unfortunate Bubble Sort		gardengnome	11	15.79
455	D flip-flop			6	16.72
362	Euclid, Manhattan and Chebyshev			18	14.99
290	Every Leaf on Every Tree		zelevin	27	14.32
243	Grille Encryption			33	13.98
415	Smallest Message		gardengnome	11	15.79
454	Multiplexer 4x4			6	16.72
286	Self-Printing Program			27	14.32
268	Logic Transformation			29	14.20
339	Parking Lot			20	14.82
346	Long Decimal Fractions		csfpython	19	14.90
353	Hurkle Hunter			18	14.99
238	Bear Hunt			32	14.03
287	Palindrome Frog		csfpython	26	14.38
393	Urban Planning		csfpython	13	15.52
217	Personality Swap			34	13.93
249	Turing Increment			30	14.14
298	Revoltle		zelevin	24	14.51
340	Zeckendorf Lite		csfpython	19	14.90
169	Automated Landing			39	13.70
261	Easter Bunnies 2D		gardengnome	28	14.26
312	The Shredder Conundrum		zelevin	22	14.66
300	Run-Length Encoding			23	14.58
395	Growth of Micro-Organisms		csfpython	12	15.65
367	Roguelike 1d			15	15.29
331	Rotating Toy Display		csfpython	19	14.90
313	Seven Segment Decoder			21	14.74
402	Game of Stones		csfpython	11	15.79
375	Space Invaders			14	15.40
382	Die Throw Sequences		csfpython	13	15.52
282	Predictable Board Game		csfpython	24	14.51
361	Rogue Mazes			15	15.29
398	Collecting Diamonds		csfpython	11	15.79
295	Vigenere Cipher Cracker			22	14.66
285	Rotate Matrix In Place			23	14.58
275	Three Buckets			24	14.51
424	New Towers of Hanoi		csfpython	8	16.29
319	Tower of Hanoi Rules		csfpython	19	14.90
250	Turing Clone			26	14.38
432	Ball Bearing Collisions		csfpython	7	16.49
383	E2C2S - try harder!		gardengnome	12	15.65
363	Language Detector			14	15.40
470	Shogi Engine			3	17.70
314	The Sorites Solution		zelevin	19	14.90
271	A Knight some Trolls and a Princess		csfpython	23	14.58
419	Special Digits		csfpython	8	16.29
408	Mad Beaver in River Labyrinth			9	16.10
386	Advent Calendar Chocolate		gardengnome	11	15.79
344	Throwing Easter Eggs Part 2		gardengnome	15	15.29
260	Low Cost Road Network		csfpython	23	14.58
413	Tree Painting		csfpython	8	16.29
358	Mandelbrot Set			13	15.52
231	Dice Black Jack			24	14.51
431	King and Rook Checkmate			6	16.72
341	Zeckendorf Advanced		csfpython	14	15.40
222	Easter Eggs Advanced			24	14.51
220	Neural Network Training			24	14.51
404	Methane Normalization		moxieman	8	16.29
462	Rota Boards		csfpython	3	17.70
332	Easter Bunnies 2D Are Back		gardengnome	14	15.40
213	Micro-Life	SK		24	14.51
266	Pancake Sorting			19	14.90
448	Button Cycles		csfpython	4	17.31
387	Big Numbers		csfpython	9	16.10
289	The Case of the Desperate Mastermind		zelevin	17	15.08
336	Currency Arbitrage			13	15.52
410	Village Door Shuffle		csfpython	7	16.49
422	Mabinogion Sheep		moxieman	6	16.72
221	XWords		quandray	22	14.66
254	Rule 30 by Turing			19	14.90
316	Apogee			14	15.40
380	Treap Study			9	16.10
263	Easter Bunnies 3D		gardengnome	18	14.99
262	Easter Bunnies 2D Advanced		gardengnome	18	14.99
235	Train Merge Advanced			20	14.82
326	Sum Them Forth			13	15.52
391	Scout Proficiency Badges		csfpython	8	16.29
443	Football League Tables		csfpython	4	17.31
311	The Mirror Maze		zelevin	14	15.40
456	Every Third Bit			3	17.70
416	Socket Server		testuser	6	16.72
279	Two Buckets Advanced		csfpython	16	15.18
441	Max versus Min		csfpython	4	17.31
305	The Catacombs of Chronos		zelevin	14	15.40
288	Langton's Ant		csfpython	15	15.29
343	Village of Ticks			11	15.79
267	Turing Maze			16	15.18
309	Board Game Sequences		csfpython	13	15.52
394	Many Shortest Routes		csfpython	7	16.49
365	Flower Border Arrangements		csfpython	9	16.10
350	Colourful Egg Sequences		gardengnome	10	15.94
306	Line Drawing Algorithm			13	15.52
320	Accordion		pearlbarley	12	15.65
276	Lucky Pairs		csfpython	15	15.29
304	Ordered Brackets		csfpython	13	15.52
333	Happy Triplets			11	15.79
303	Towers Under Cover			13	15.52
345	Elliptic Curves Basics			10	15.94
479	Robot and the Wall			1	18.90
373	Railroad Rat		csfpython	8	16.29
342	Adaptive Arithmetic Coding			10	15.94
264	Party Presents		csfpython	15	15.29
369	Flappy Bird			8	16.29
322	Gray Decoder			11	15.79
242	Comment Stripper			16	15.18
430	Cutting Paper		csfpython	4	17.31
224	Transposing List of Lists			17	15.08
237	Road Network Destruction			16	15.18
378	Space Invaders Automation			7	16.49
310	Board Game Sequences Advanced		csfpython	11	15.79
227	Hashtable Implementation			16	15.18
321	Hanoi Tower Heights		csfpython	10	15.94
302	Sound-Controlled Robot			11	15.79
225	Hamurabi			15	15.29
327	Dobbin's Long Journey		csfpython	9	16.10
325	Ultimate Sort Trial			9	16.10
397	Trading Bot			5	16.99
283	Predictable Board Game on 10 Boards		csfpython	11	15.79
252	Shadok and Gibis			12	15.65
370	Jewels			6	16.72
308	Circle Drawing Algorithm			9	16.10
328	Beep Beep Beep			8	16.29
278	Polyomino Generation			10	15.94
215	Klotski	SK		13	15.52
236	Is the Earth Flat			12	15.65
273	Logic Glitches			10	15.94
251	Radio Spies			11	15.79
280	Three Buckets Re-visited		csfpython	9	16.10
232	Shift Register Randomizer			11	15.79
226	Multiplicative Persistence Backtrace			11	15.79
248	Christmas Puzzle			10	15.94
348	Trick-Taking Game			5	16.99
240	Playfair Cipher Cracking			9	16.10
239	Foxes and Geese			9	16.10
396	Chocolate Triangles and BF		moxieman	3	17.70
272	Hexplore			7	16.49
355	Robots Game			4	17.31
228	Maze Mapping Robot			8	16.29
317	Launch to Orbit			5	16.99
356	Robots Game Autoplay			3	17.70
318	Launch to Orbit automated			2	18.20