Problems

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

Overview of the web-page generation and
loading process. Intro to HTTP, JS, PHP.
Video by CodeAbbey

Tagged with: c-0 - total 239 (clear filter)

Id	Title	Translations	Author	Solved	Blessing
1	Sum "A+B"	DE ES FR AR ZH RO RU SK		56389	1.00
2	Sum in Loop	DE ES FR AR ZH RO RU SK		34337	1.86
3	Sums in Loop	DE ES FR AR ZH RO RU SK		26140	2.34
4	Minimum of Two	DE ES FR AR ZH RO RU SK		22761	2.58
5	Minimum of Three	DE ES FR AR ZH RO RU SK		20389	2.77
15	Maximum of array	DE ES AR ZH RO RU SK		17813	3.00
6	Rounding	DE ES AR ZH RO RU SK		16378	3.15
7	Fahrenheit to Celsius	DE ES AR ZH RO RU SK		15679	3.22
20	Vowel Count	DE ES AR ZH RO RU SK		12714	3.59
11	Sum of digits	DE ES RU ZH SK		12619	3.60
8	Arithmetic Progression	DE ES RU ZH SK		11808	3.72
41	Median of Three	DE ES AR ZH RO RU SK		10836	3.87
9	Triangles	DE ES RU ZH SK		11204	3.81
28	Body Mass Index	DE ES ZH RU SK		10703	3.89
13	Weighted sum of digits	DE ES RU ZH SK		10197	3.97
43	Dice Rolling	DE ES ZH RU SK		9183	4.15
16	Average of an array	DE ES RU SK		9650	4.07
30	Reverse String	DE ES RU SK		9090	4.17
17	Array Checksum	DE ES RU SK		8942	4.20
21	Array Counters	DE ES RU SK		8327	4.32
10	Linear Function	DE ES RU SK		8049	4.38
48	Collatz Sequence	DE ES RU SK		7269	4.56
12	Modulo and time difference	DE ES RU SK		7391	4.53
14	Modular Calculator	ES SK		6832	4.67
27	Bubble Sort	ES RU SK		6175	4.84
26	Greatest Common Divisor	ES SK RU		6016	4.89
18	Square Root	ES RU		5809	4.95
29	Sort with Indexes	RU		5571	5.02
50	Palindromes	DE ES RU SK		5117	5.17
23	Bubble in Array	ES RU		5344	5.09
52	Pythagorean Theorem	RU		4907	5.24
31	Rotate String	ES RU		5102	5.17
67	Fibonacci Sequence	RU		4417	5.42
68	Bicycle Race	ES RU		4391	5.43
57	Smoothing the Weather	ES RU		4417	5.42
24	Neumann's Random Generator	DE ES RU		4774	5.29
35	Savings Calculator			4192	5.51
104	Triangle Area	ES		3488	5.83
25	Linear Congruential Generator	RU		4140	5.54
44	Double Dice Roll	RU		3928	5.63
32	Josephus Problem	RU		4032	5.58
81	Bit Count	RU		3521	5.82
19	Matching Brackets	ES RU		3784	5.69
58	Card Names			3352	5.90
128	Combinations Counting			2766	6.24
47	Caesar Shift Cipher	SK		3437	5.86
49	Rock Paper Scissors			3384	5.89
55	Matching Words			3282	5.94
94	Fool's Day 2014	SK		2868	6.17
59	Bulls and Cows			2968	6.11
61	Prime Numbers Generation	RU		2922	6.14
22	Two Printers	ES RU		3150	6.01
42	Blackjack Counting			2700	6.28
120	Selection Sort			2117	6.70
38	Quadratic Equation			2488	6.42
33	Parity Control	RU		2444	6.45
53	King and Queen			2181	6.65
34	Binary Search			2252	6.59
171	Tree Height Measurement			1517	7.28
37	Mortgage Calculator	ZH		2117	6.70
45	Cards Shuffling	ZH		2061	6.75
69	Fibonacci Divisibility			1930	6.86
63	Integer Factorization	ZH		1847	6.94
46	Tic-Tac-Toe	ZH		1904	6.89
72	Funny Words Generator			1649	7.13
62	Prime Ranges			1688	7.09
121	Insertion Sort			1408	7.41
75	Yacht or Dice Poker			1568	7.22
172	Cloud Altitude Measurement			1148	7.76
127	Anagrams			1311	7.53
39	Share Price Volatility			1574	7.22
134	Flying Text Screensaver			1213	7.67
156	Luhn Algorithm	SK		1041	7.93
114	Tricky Printing			1149	7.76
80	Duel Chances			1181	7.71
36	Code Guesser	UA		1230	7.64
135	Variable Length Code			935	8.12
74	Clock Hands			1108	7.83
105	Convex Polygon Area			964	8.07
54	Pythagorean Triples			1081	7.87
145	Modular Exponentiation			810	8.37
73	Hexagonal Grid			988	8.02
116	Summing Up			838	8.31
97	Girls and Pigs			879	8.23
181	Reverse Polish Notation			622	8.83
187	Static Web Page			599	8.89
98	Azimuth at Treasure Island			767	8.46
188	Basics of HTML			573	8.97
122	QuickSort			708	8.60
85	Rotation in 2D Space			774	8.45
51	Dungeons and Dragons Dice	UA		826	8.33
56	Life is Simple			801	8.39
40	Paths in the Grid	UA		823	8.34
70	Most Frequent Word			730	8.55
66	Caesar Cipher Cracker			732	8.54
88	Pitch and Notes			677	8.68
108	Star Medals			611	8.86
95	Simple Linear Regression			605	8.87
87	Tree Builder			618	8.84
60	Sweet Harvest			656	8.73
77	Point to Segment Distance			613	8.85
211	Information Entropy			387	9.65
86	Brainfuck Interpreter			576	8.96
207	Suffix Array			378	9.69
91	Game of 2048			540	9.07
71	Fibonacci Divisibility Advanced			567	8.99
176	Say 100			410	9.55
143	Extended Euclidean Algorithm			447	9.40
101	Gradient Calculation			500	9.21
119	Brain Fibo			463	9.34
195	Mul Two			358	9.78
82	Levenshtein Distance			508	9.18
191	Spaceship Weight Fraud			359	9.78
206	Base-32 Encoding			325	9.95
89	Instrument Tuner			474	9.30
64	Maze Pathfinder			496	9.22
131	Four Pics One Word			396	9.61
79	Cycles Detection			458	9.36
92	Binary Heap			428	9.47
189	Dynamic Web Page			302	10.08
83	Graph Generator			413	9.54
136	Variable Length Code Unpack			353	9.81
126	Sequence of Squares			360	9.77
150	Introducing Regexps			334	9.90
90	Lexicographic Permutations			388	9.65
78	Bezier Curves			393	9.62
170	Binary Search in Array			298	10.10
167	Copy Line			301	10.08
197	Loops in Assembly			265	10.31
154	Breadth First Search			307	10.05
65	Transitive Closure on Candy States			381	9.68
117	Divide by Two			328	9.94
99	Uphill Shooting			344	9.85
144	Modular Inverse			280	10.21
155	Depth First Search			268	10.29
161	Topological Sorting			260	10.34
174	Calculation of Pi			246	10.43
133	Billiard Ball			271	10.27
165	Safe Landing			242	10.46
76	Pawn Move Validator			311	10.03
140	Proper Bracket Sequences			259	10.34
96	Snake Arcade			285	10.18
184	Matches Picking		quandray	209	10.72
190	Query String Parameters			204	10.76
123	Knapsack of Integers			252	10.39
103	Easter Eggs			267	10.29
93	Starving Priority Queue			274	10.25
84	Dijkstra in the Network			277	10.23
130	Combinations with Repetitions			239	10.48
125	Bogosort			237	10.50
173	Chords of Music			201	10.78
109	Lucky Tickets			232	10.54
146	Color Cubes			206	10.74
151	Word Ladders			198	10.81
129	Enumerating Combinations			203	10.77
164	Page Rank			180	10.97
208	Neighborhood of a String			153	11.25
138	Huffman Coding			191	10.87
139	Beam Balance and Masses			190	10.88
201	Point in Polygon			148	11.31
194	Convex Hull and Farmers			152	11.27
137	Shannon-Fano Coding			176	11.01
199	Employees Web App			141	11.40
152	RSA Cryptography			166	11.11
192	Gangster Battles			141	11.40
111	Necklace Count			182	10.96
110	Lucky Tickets Advanced			172	11.05
168	Caesar meets BF			137	11.45
148	Public Key Cryptography Intro			140	11.41
124	Knapsack Backtracking			149	11.30
162	Rubik's Cube			131	11.52
179	Look and Say binary			123	11.63
106	Random Search Optimization			155	11.23
202	Dancing Pairs			112	11.79
198	Prn Hex Str			111	11.81
182	Frodo and Black Riders			117	11.72
214	Sick Travellers			103	11.94
102	Travelling Salesman			145	11.35
177	Nim Game			114	11.76
160	Social Web Scraper			120	11.67
185	Simple 3D Scene			108	11.86
158	Hamming Codes			117	11.72
157	Emirp primE			115	11.75
159	Hard Life			106	11.89
196	Fibonacci Randomizer			87	12.23
153	Fermat goes hacking RSA			101	11.97
100	Crossing the Road			118	11.70
115	Gradient Descent for SLE			111	11.81
141	Sliding Window Search			100	11.99
186	Simple 3D Scene (cont)			84	12.29
193	Maximum Flow			80	12.37
166	Page Rank as Eigenvector			88	12.21
142	LZ77 decompression			93	12.11
209	Suffix Array Advanced			72	12.55
210	Ticket Puzzle			71	12.58
113	Ground Zero			95	12.08
203	Tic-Tac-Toe Minimax Algorithm			70	12.60
219	Neural Network Calculation			65	12.73
112	Travelling Salesman Inverted			94	12.09
216	Cracking Linear Congruential Generator			63	12.78
132	Stream Cipher Breaking			82	12.33
163	Colliding Balls			72	12.55
107	Knight's Tour			84	12.29
175	Algae Robot			67	12.67
205	Clustering the Stars			58	12.92
230	Move-To-Front Transform			52	13.11
200	Fizz Buzz in Asm			58	12.92
204	Wandering Star			55	13.01
218	Rain Must Fall	DE		50	13.17
212	BCD to Hex			51	13.14
149	Prime Chains			61	12.84
233	Language Study			43	13.43
178	Maze of the Wumpus			52	13.11
147	Color Cubes Advanced			57	12.95
118	Maxit Single-Player			61	12.84
180	Simple Game of Sticks			48	13.24
223	Introducing Scheme			40	13.55
229	Burrows-Wheeler Transform			36	13.73
183	Connect Four			43	13.43
238	Bear Hunt			29	14.10
217	Personality Swap			31	13.98
234	Train Merge			28	14.16
169	Automated Landing			35	13.78
213	Micro-Life	SK		24	14.41
220	Neural Network Training			22	14.56
231	Dice Black Jack			19	14.80
222	Easter Eggs Advanced			19	14.80
221	XWords		quandray	19	14.80
235	Train Merge Advanced			15	15.19
237	Road Network Destruction			13	15.42
227	Hashtable Implementation			13	15.42
215	Klotski	SK		13	15.42
225	Hamurabi			12	15.55
226	Multiplicative Persistence Backtrace			11	15.69
224	Transposing List of Lists			11	15.69
239	Foxes and Geese			9	16.00
232	Shift Register Randomizer			9	16.00
236	Is the Earth Flat			8	16.19
228	Maze Mapping Robot			6	16.62