Problems
Callback's own problems and the LeetCode questions companies have been asking, in one place — pick a category, then filter by company, frequency, status, difficulty, topic, and language.
Asked on LeetCode
3,115 questions · all time
- Split and Merge Array TransformationmediumArrayHash TableBreadth-First Search1 company
- Stone Game VhardArrayMathDynamic ProgrammingGame Theory1 company
- Subarrays Distinct Element Sum of Squares IeasyArrayHash TableSegment Tree1 company
- Subsequence After One Replacementmedium1 company
- Sum of Beautiful SubsequenceshardArrayMathBinary Indexed TreeNumber Theory1 company
- Sum of Digits in Base KeasyMath1 company
- Sum of Good NumberseasyArray1 company
- Sum of Squares of Special ElementseasyArrayEnumeration1 company
- The Maze IIIhardArrayStringDepth-First SearchBreadth-First Search+71 company
- The Most Recent Orders for Each ProductmediumDatabase1 company
- Traffic Signal ColoreasyMathStringSimulation1 company
- Widest Possible Fencemedium1 company
- Wiggle SubsequencemediumArrayDynamic ProgrammingGreedy1 company
- Year on Year Growth RatehardDatabase1 company
- Zero Array Transformation IVmediumArrayDynamic Programming1 company
Listings only — titles, difficulty, and tags link out to LeetCode. Imported from the leetcode-company-wise-problems snapshot dated 1 June 2025. Frequency is that dataset's own relative score within a company and time range.