all levels · 9 questions · ~270 min
DS&A · timed mock (medium, blind)
Nine fresh mediums, never seen in the other sets. Solve blind against the 30-minute clock, narrate out loud, no peeking. Two back-to-back mirrors the real 60-minute round.
0 / 9 passed
- 11Group Anagramsarray · hashmap · string15m
- 123Sumarray · two-pointers · sorting15m
- 13Longest Repeating Character Replacementstring · sliding-window · hashmap15m
- 14Daily Temperaturesarray · stack · monotonic-stack15m
- 15Search in Rotated Sorted Arrayarray · binary-search15m
- 16Merge Intervalsarray · sorting · intervals15m
- 17Binary Tree Level Order Traversaltree · bfs · queue15m
- 18Subsetsarray · backtracking · bit-manipulation15m
- 19House Robberarray · dynamic-programming15m