| # | Problem | Language | Link | Date |
|---|---|---|---|---|
| 1 | Sum "A+B" | PHP | view | Aug 10 2015 |
| 4 | Minimum of Two | Ruby | view | Apr 3 2022 |
| 6 | Rounding | C# | view | Nov 7 2014 |
| 6 | Rounding | Fortran | view | Feb 11 2021 |
| 6 | Rounding | Python | view | Feb 27 2015 |
| 16 | Average of an array | C# | view | Mar 19 2022 |
| 16 | Average of an array | JavaScript | view | Jun 20 2021 |
| 19 | Matching Brackets | Python | view | Oct 23 2023 |
| 22 | Two Printers | Python | view | Oct 27 2023 |
| 23 | Bubble in Array | BCPL | view | Sep 7 2024 |
| 38 | Quadratic Equation | C/C++ | view | Jan 4 2022 |
| 48 | Collatz Sequence | Go | view | Aug 20 2024 |
| 48 | Collatz Sequence | Other | view | Sep 4 2024 |
| 48 | Collatz Sequence | Lua | view | Sep 29 2024 |
| 48 | Collatz Sequence | Python | view | Aug 20 2024 |
| 48 | Collatz Sequence | BCPL | view | Sep 9 2024 |
| 61 | Prime Numbers Generation | Python | view | May 29 2022 |
| 63 | Integer Factorization | Python | view | Dec 3 2023 |
| 77 | Point to Segment Distance | Other | view | Apr 10 2021 |
| 86 | Brainfuck Interpreter | JavaScript | view | Mar 18 2014 |
| 87 | Tree Builder | Python | view | Mar 19 2014 |
| 93 | Starving Priority Queue | Python | view | Mar 31 2014 |
| 95 | Simple Linear Regression | Python | view | Apr 4 2014 |
| 96 | Snake Arcade | Python | view | Apr 5 2014 |
| 100 | Crossing the Road | Python | view | Apr 11 2014 |
| 103 | Easter Eggs | Python | view | Apr 20 2014 |
| 114 | Tricky Printing | Python | view | May 30 2014 |
| 114 | Tricky Printing | Brainfuck | view | Jan 19 2015 |
| 115 | Gradient Descent for SLE | Python | view | Jun 1 2014 |
| 116 | Summing Up | Python | view | Jun 14 2014 |
| 117 | Divide by Two | Brainfuck | view | Jun 18 2014 |
| 140 | Proper Bracket Sequences | JavaScript | view | Aug 25 2022 |
| 147 | Color Cubes Advanced | Other | view | Mar 11 2022 |
| 149 | Prime Chains | Python | view | Oct 26 2014 |
| 150 | Introducing Regexps | Java | view | Sep 11 2014 |
| 154 | Breadth First Search | Python | view | Dec 26 2023 |
| 156 | Luhn Algorithm | C/C++ | view | Dec 8 2024 |
| 168 | Caesar meets BF | Brainfuck | view | Jan 19 2015 |
| 190 | Query String Parameters | Other | view | Aug 20 2020 |
| 193 | Maximum Flow | Other | view | Jan 17 2015 |
| 195 | Mul Two | Asm4004 | view | Jan 26 2015 |
| 199 | Employees Web App | Other | view | Jan 28 2015 |
| 202 | Dancing Pairs | Python | view | Feb 21 2015 |
| 210 | Ticket Puzzle | Python | view | Aug 30 2015 |
| 220 | Neural Network Training | Python | view | Sep 1 2021 |
| 221 | XWords | Other | view | Oct 8 2024 |
| 222 | Easter Eggs Advanced | Other | view | Jan 20 2021 |
| 223 | Introducing Scheme | Scheme | view | Sep 11 2022 |
| 224 | Transposing List of Lists | Scheme | view | May 2 2021 |
| 226 | Multiplicative Persistence Backtrace | Other | view | Mar 12 2021 |
| 228 | Maze Mapping Robot | Scheme | view | Mar 23 2021 |
| 229 | Burrows-Wheeler Transform | PHP | view | Mar 28 2021 |
| 233 | Language Study | Python | view | Jul 2 2021 |
| 234 | Train Merge | Go | view | Sep 9 2021 |
| 235 | Train Merge Advanced | Python | view | Sep 9 2021 |
| 236 | Is the Earth Flat | C# | view | Sep 11 2021 |
| 237 | Road Network Destruction | Other | view | Oct 1 2021 |
| 240 | Playfair Cipher Cracking | Other | view | Nov 4 2021 |
| 241 | Village Ways | JavaScript | view | Nov 14 2021 |
| 242 | Comment Stripper | RegExp | view | Nov 23 2021 |
| 243 | Grille Encryption | Other | view | Nov 28 2021 |
| 245 | Aggregations in SQL | SQL | view | Mar 11 2022 |
| 253 | Beautiful Line Chart | JavaScript | view | Feb 4 2023 |
| 255 | LCM of a range | Other | view | Jan 7 2022 |
| 256 | Rook Jump Maze | Other | view | Jan 9 2022 |
| 257 | Missing Records in SQL | SQL | view | Mar 11 2022 |
| 258 | Text Justification | Other | view | Jan 20 2022 |
| 260 | Low Cost Road Network | Other | view | Jan 29 2022 |
| 264 | Party Presents | Other | view | Feb 10 2022 |
| 266 | Pancake Sorting | Python | view | Feb 26 2022 |
| 267 | Turing Maze | Turing Machine | view | Mar 7 2022 |
| 268 | Logic Transformation | PHP | view | Mar 13 2022 |
| 269 | Fibonacci coding | Other | view | Mar 15 2022 |
| 270 | Hexlife | Other | view | Mar 18 2022 |
| 271 | A Knight some Trolls and a Princess | Other | view | Mar 20 2022 |
| 273 | Logic Glitches | Other | view | Apr 2 2022 |
| 274 | Two Buckets | Other | view | Apr 11 2022 |
| 275 | Three Buckets | Other | view | Apr 12 2022 |
| 276 | Lucky Pairs | Other | view | Apr 19 2022 |
| 277 | The Adventure of Morse Code | Other | view | Apr 23 2022 |
| 278 | Polyomino Generation | Other | view | May 3 2022 |
| 281 | Basic Tokenizer | Other | view | May 12 2022 |
| 282 | Predictable Board Game | Other | view | May 25 2022 |
| 285 | Rotate Matrix In Place | BASIC | view | Jun 1 2022 |
| 287 | Palindrome Frog | Other | view | Jun 16 2022 |
| 288 | Langton's Ant | Other | view | Jul 7 2022 |
| 290 | Every Leaf on Every Tree | Other | view | Aug 8 2022 |
| 291 | Squirrels vs. Acorns | Other | view | Aug 9 2022 |
| 292 | Factorial Trailing Zeroes | Other | view | Aug 10 2022 |
| 293 | Sums of Triplets | Other | view | Aug 10 2022 |
| 294 | Vigenere Cipher | Other | view | Aug 11 2022 |
| 295 | Vigenere Cipher Cracker | Other | view | Aug 11 2022 |
| 296 | Tree Value | Other | view | Aug 12 2022 |
| 297 | Collatz in the Range | Other | view | Aug 14 2022 |
| 298 | Revoltle | Other | view | Aug 16 2022 |
| 299 | Tree Visualizer | Other | view | Aug 19 2022 |
| 300 | Run-Length Encoding | Python | view | Aug 19 2022 |
| 300 | Run-Length Encoding | Other | view | Aug 19 2022 |
| 301 | Skyscraper Price | Python | view | Aug 21 2022 |
| 302 | Sound-Controlled Robot | Other | view | Aug 21 2022 |
| 303 | Towers Under Cover | Python | view | Aug 23 2022 |
| 303 | Towers Under Cover | Other | view | Aug 23 2022 |
| 304 | Ordered Brackets | Other | view | Aug 24 2022 |
| 305 | The Catacombs of Chronos | Other | view | Aug 31 2022 |
| 306 | Line Drawing Algorithm | Asm4004 | view | Sep 5 2022 |
| 308 | Circle Drawing Algorithm | BASIC | view | Sep 8 2022 |
| 311 | The Mirror Maze | Other | view | Sep 26 2022 |
| 312 | The Shredder Conundrum | Other | view | Oct 2 2022 |
| 314 | The Sorites Solution | Other | view | Oct 15 2022 |
| 316 | Apogee | Pascal | view | Oct 29 2022 |
| 317 | Launch to Orbit | BASIC | view | Nov 3 2022 |
| 318 | Launch to Orbit automated | BASIC | view | Nov 6 2022 |
| 319 | Tower of Hanoi Rules | Other | view | Nov 12 2022 |
| 320 | Accordion | Other | view | Nov 20 2022 |
| 321 | Hanoi Tower Heights | Other | view | Dec 3 2022 |
| 322 | Gray Decoder | Other | view | Dec 10 2022 |
| 323 | Next Palindrome | Other | view | Dec 23 2022 |
| 327 | Dobbin's Long Journey | Other | view | Jan 9 2023 |
| 328 | Beep Beep Beep | BASIC | view | Jan 15 2023 |
| 328 | Beep Beep Beep | C# | view | Jan 15 2023 |
| 330 | Easter Bunnies Are Back | Other | view | Feb 19 2023 |
| 331 | Rotating Toy Display | Other | view | Feb 19 2023 |
| 332 | Easter Bunnies 2D Are Back | Other | view | Feb 19 2023 |
| 333 | Happy Triplets | Other | view | Mar 6 2023 |
| 334 | Find all of the SETs | Other | view | Mar 6 2023 |
| 335 | Venus Visible | Other | view | Mar 12 2023 |
| 336 | Currency Arbitrage | Other | view | Mar 22 2023 |
| 338 | Throwing Easter Eggs | Other | view | Apr 1 2023 |
| 339 | Parking Lot | Other | view | Apr 2 2023 |
| 340 | Zeckendorf Lite | Other | view | Apr 14 2023 |
| 341 | Zeckendorf Advanced | Other | view | Apr 28 2023 |
| 342 | Adaptive Arithmetic Coding | Other | view | Apr 28 2023 |
| 343 | Village of Ticks | Other | view | Apr 30 2023 |
| 344 | Throwing Easter Eggs Part 2 | Other | view | May 1 2023 |
| 345 | Elliptic Curves Basics | Other | view | May 12 2023 |
| 349 | Burrows | Other | view | Jun 2 2023 |
| 350 | Colourful Egg Sequences | Other | view | Jun 7 2023 |
| 351 | Nicomachus | Other | view | Jun 8 2023 |
| 352 | Hurkle | Lua | view | Sep 19 2023 |
| 353 | Hurkle Hunter | Lua | view | Jun 13 2023 |
| 354 | Too Many Divisors | Other | view | Jun 15 2023 |
| 355 | Robots Game | Lua | view | Jun 18 2023 |
| 357 | Ulam's Prime Spiral | Lua | view | Jun 27 2023 |
| 358 | Mandelbrot Set | C# | view | Jun 28 2023 |
| 358 | Mandelbrot Set | Lua | view | Jun 28 2023 |
| 364 | Arthur Engel's Randomizer | Python | view | Aug 4 2023 |
| 364 | Arthur Engel's Randomizer | Lua | view | Aug 4 2023 |
| 366 | Image Cutting | Python | view | Aug 12 2023 |
| 367 | Roguelike 1d | Other | view | Sep 2 2023 |
| 369 | Flappy Bird | Other | view | Sep 9 2023 |
| 371 | Pages to Print | Other | view | Sep 21 2023 |
| 372 | String Minimization | Python | view | Sep 22 2023 |
| 373 | Railroad Rat | Lua | view | Sep 26 2023 |
| 376 | Cartesian Tree Visualization | PHP | view | Oct 6 2023 |
| 379 | Dice with Infinity Sides | Lua | view | Oct 9 2023 |
| 380 | Treap Study | Other | view | Oct 10 2023 |
| 388 | Fibonacci Guessing Game | Lua | view | Dec 12 2023 |
| 390 | Card Pairing Solitaire | Lua | view | Dec 22 2023 |
| 392 | Fixing an Anagram | Lua | view | Jan 6 2024 |
| 396 | Chocolate Triangles and BF | Brainfuck | view | Feb 21 2024 |
| 400 | Memory Check | Python | view | Mar 10 2024 |
| 404 | Methane Normalization | Lua | view | Apr 1 2024 |
| 407 | River Labyrinth | Lua | view | Apr 22 2024 |
| 412 | Json Fix | Lua | view | Jun 9 2024 |
| 414 | MIDI Variable Length Numbers | Lua | view | Jun 11 2024 |
| 415 | Smallest Message | Lua | view | Jun 14 2024 |
| 416 | Socket Server | Python | view | Jun 17 2024 |
| 417 | Unfortunate Bubble Sort | Lua | view | Jun 19 2024 |
| 421 | Princess and Tiger | Lua | view | Jul 11 2024 |
| 427 | Cheapest Bus Tickets | C/C++ | view | Oct 10 2024 |
| 431 | King and Rook Checkmate | BCPL | view | Sep 15 2024 |
| 431 | King and Rook Checkmate | Python | view | Sep 15 2024 |
| 431 | King and Rook Checkmate | C/C++ | view | Sep 19 2024 |
| 437 | Elections and Happiness | Lua | view | Nov 6 2024 |
| 438 | Maze Generator | Lua | view | Nov 9 2024 |
| 442 | Chomp | Lua | view | Dec 8 2024 |