💻 Category

Code

Measures programming skill in a small space: correct, idiomatic one-liners and CSS that actually runs, with zero fluff.

Rounds 7

R40 · isPalindrome (ignore case & non-alphanumerics)

Schreibe eine JavaScript-Funktion isPalindrome(s), die true zurückgibt, wenn s ein Palindrom ist — Groß/Kleinschreibung ignorieren und alle Nicht-Alph…

4/8 local answeredscored vs gold

R9 · One-liner code

Five one-liner coding tasks. Output exactly 5 numbered lines, each containing ONLY the solution (no explanation). 1. A…

12/13 models answeredunscored

R15 · CSS spinner

Write a CSS-only loading spinner: a single <div class="spinner"></div> plus a <style> block, max 15 lines of CSS total.…

10/13 models answeredunscored

R21 · Sorting race bubble/insertion/selection

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that visually races exactly 3 sorting algorithms…

11/13 models answeredscored

R24 · Maze race BFS/DFS/A*

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that visually races exactly 3 pathfinding algori…

11/13 models answeredscored

R25 · Sorting race quick/merge/heap

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that visually races exactly 3 sorting algorithms…

11/13 models answeredscored

R4 · Sorting race: bubble vs insertion vs quicksort

Three sorting algorithms — bubble, insertion, quick — racing side by side on the SAME shuffled 60-bar array. Animated, auto-starting, auto-restarting,…

5/7 models answerededitorial scoresclassic archive

R60 · Dijkstra vs A* on a weighted grid

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that runs Dijkstra and A* side by side on the SAME randomly weighted 30x20 gri…

5/8 models answeredunscored

R61 · Convex hull built step by step

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that computes the convex hull of 40 random points with the Graham scan and ani…

3/8 models answeredunscored

R62 · Huffman tree from letter frequencies

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that builds a Huffman code from the letter frequencies of a fixed sample sente…

4/8 models answeredunscored

R63 · Kruskal's MST with union-find

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that animates Kruskal's minimum spanning tree on a random graph of 25 nodes dr…

4/8 models answeredunscored

R64 · N-Queens solved by backtracking

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that solves the 8-queens problem by backtracking and animates the search on a …

5/8 models answeredunscored

R65 · Delaunay triangulation, triangle by triangle

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that builds the Delaunay triangulation of 30 random points incrementally on a …

5/8 models answeredunscored

R66 · AVL tree rebalancing with rotations

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that inserts 20 random keys one at a time into an AVL tree and draws the tree …

4/8 models answeredunscored

R67 · Sieve of Eratosthenes on a number grid

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that animates the Sieve of Eratosthenes for the numbers 2 to 400 laid out as a…

4/8 models answeredunscored

R68 · Edit-distance DP matrix with backtrace

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that computes the Levenshtein edit distance between two fixed words of 8 to 10…

5/8 models answeredunscored

R69 · Replanning when the map changes

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that animates a robot navigating a 30x20 grid to a goal on a <canvas> while th…

4/8 models answeredunscored

R70 · Binary search, step by step

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that animates a binary search on a sorted array of 40 values drawn as labelled…

5/8 models answeredunscored

R71 · Flood fill on a pixel grid

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that animates a flood fill on a 60x40 grid of coloured cells drawn on a <canva…

3/8 models answeredunscored

R72 · Maze generation by recursive backtracking

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that generates a 30x20 maze with the recursive backtracker on a <canvas>. Carv…

4/8 models answeredunscored

R73 · KMP string search with prefix table

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that animates the Knuth-Morris-Pratt string search on a <canvas>. First build …

3/8 models answeredunscored

R74 · Quadtree collision detection

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that animates 120 moving balls in a box on a <canvas> with a quadtree for coll…

4/8 models answeredunscored

R75 · Falling sand on a cell grid

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that simulates falling sand as a cellular automaton on a 150x100 CELL GRID dra…

5/8 models answeredunscored

R76 · Falling sand as free particles

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that simulates falling sand as 1500 FREE-MOVING PARTICLES with continuous posi…

3/8 models answeredunscored

R77 · Crowd leaving a room, cell by cell

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that simulates 60 people leaving a room through one exit on a 40x30 CELL GRID …

4/8 models answeredunscored

R78 · Crowd leaving a room by steering

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that simulates 60 people leaving a room through one exit as CONTINUOUS MOVEMEN…

3/8 models answeredunscored

R79 · Aggregation on a lattice

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that simulates diffusion-limited aggregation on a 200x150 CELL GRID drawn on a…

5/8 models answeredunscored

R80 · Aggregation by continuous drift

Create ONE self-contained HTML file (STRICT LIMIT: max 120 lines total) that simulates particles clustering by CONTINUOUS MOVEMENT on a <canvas>. A se…

4/8 models answeredunscored