Tracewise
Visual-first guides to data structures, algorithms, and system design. Every case is shown with a worked, animated example — not just described.
2 guides
- Jun 2026Easy
Palindrome Number
Decide whether an integer reads the same both ways — without converting it to a string, using the reverse-half technique.
pattern · Meet in the middle (digits)
- Jun 2026Easy
Valid Parentheses
Decide whether every bracket in a string is closed by the right type in the right order — the canonical stack problem, scanned in a single pass.
pattern · Stack (LIFO matching)