Practical guides, tips, and stories on coding interviews and smarter LeetCode practice with AI.
Index juggling feels abstract until you draw each swap. Here's a visual walkthrough for array-based min-heaps.
LeetCopilot Team
9 min
3/27/2025
DSU feels abstract until you sketch parent pointers. Here's how to visualize path compression on grid problems.
10 min
Brute force won't pass the time limit. Learn how to sort, prune, and break early to turn a TLE backtracking solution into an Accepted one.
Frequency counting should be the easy part. If you keep losing points to off-by-one counts and missing keys, here's what's going wrong.
3/22/2025
Backtracking on strings feels like magic until you visualize the call tree. Here's how to draw it and spot branching errors.
3/21/2025
Can you verify your BFS order on a whiteboard? Most candidates can't. Here is the 'Queue Snapshot' technique to trace level-order traversal without getting lost.
3/20/2025
Keep elements in sorted order so the top tells you the next smaller or greater value. Sound confusing? Here's the visual breakdown.
2/15/2025
Many two-pointer bugs hide in one line: the loop condition. Here's how to get it right every time.
8 min
DP feels abstract until you can see the table fill itself. Here's a repeatable rehearsal flow that lands in interviews.
One wrong `<` sign can fail an interview. Stop guessing boundaries and learn the 'Inclusive-Exclusive' rule that prevents every off-by-one error.
2/10/2025
