~/problems
Problems
Basics first, then the classics, then company-style assessments. Every problem has tests you run right here; multi-level ones unlock as you go. See the roadmap.
Interview roadmap
Math & matrices
Digit arithmetic, rotating and marking grids in place.
9 problems
Interview roadmap
Math & matrices Digit arithmetic, rotating and marking grids in place.
- Basics: read a grid in a spiral basics py · c++ · java easy
- Rotate Image py · c++ · java medium
- Set Matrix Zeroes py · c++ · java medium
- Happy Number py · c++ · java easy
- Plus One py · c++ · java easy
- Multiply Strings py · c++ · java medium
- Reverse Integer py · c++ · java medium
- Roman to Integer py · c++ · java easy
- Excel Sheet Column Title py · c++ · java easy