Maximize Consecutive Dance Moves
Reported by candidates from TikTok's online assessment. Pattern, common pitfall, and the honest play if you blank under the timer.
TikTok's March 2024 OA included a sliding-window problem disguised as a dance moves question. You're given a sequence and need to find the longest consecutive substring or subarray that satisfies some constraint, usually a count or character limit. This is a classic window pattern that trips up candidates who overthink it. StealthCoder will spot the window logic instantly if you blank on the live OA, so you can move forward without panic.
Pattern and pitfall
The trick here is recognizing that you need two pointers or a dynamic window to avoid brute-force O(n squared) solutions. Most candidates either expand the window incorrectly or forget to contract it when the constraint breaks. The pattern: expand the right pointer, check if the condition holds, shrink from the left if it doesn't, and track the max length at each valid state. Common pitfall is off-by-one errors when calculating the window size or forgetting to update your answer after shrinking. StealthCoder serves as your safety net on the actual assessment if the constraint wording trips you up and you need to see the window logic applied correctly in real time.
Memorize the pattern. If you can't, run StealthCoder. The proctor sees the IDE. They don't see what's behind it.
You can drill Maximize Consecutive Dance Moves cold, or you can hedge it. StealthCoder runs invisibly during screen share and surfaces a working solution in under 2 seconds. The proctor sees the IDE. They don't see what's behind it. Made by an engineer who treats the OA as theater. If yours is tonight, you don't have time to grind. You have time to hedge.
Get StealthCoderRelated leaked OAs
This OA pattern shows up on LeetCode as longest substring without repeating characters. If you have time before the OA, drill that.
You've seen the question.
Make sure you actually pass TikTok's OA.
TikTok reuses patterns across OAs. Made by an engineer who treats the OA as theater. If yours is tonight, you don't have time to grind. You have time to hedge. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Maximize Consecutive Dance Moves FAQ
What exactly is a sliding window and how do I know when to use it?+
A sliding window is two pointers on an array or string that move together, usually left and right. Use it when the problem asks for a longest or shortest contiguous subsequence with a specific property. TikTok loves these because they're O(n) instead of O(n squared). If you see 'consecutive' or 'subarray with at most k of something,' think window first.
How do I handle the shrinking part without losing my answer?+
Update your max answer while the window is valid, then shrink. Don't update after you shrink. Keep a variable like maxLength that you update only when the condition is satisfied. Shrink the left pointer until the condition holds again, then expand the right pointer on the next iteration.
Is this problem still in TikTok's rotation or is it outdated?+
Sliding window is a core pattern for any company doing string or array OAs. TikTok reported this in March 2024, so it's fresh. The specific dance moves theme may change, but the underlying window logic remains a staple of their assessments.
Can I solve this without a window, just brute force?+
Technically yes, but it'll be O(n squared) and you'll time out. A window solution is O(n) with one pass. TikTok's OA has strict time limits, so brute force will fail on large inputs. Learn the window pattern now.
What's the most common mistake on problems like this?+
Forgetting to shrink the left pointer when the constraint breaks, so your window grows unbounded. Or updating the answer at the wrong time. Write out your window state (left, right, current count) on paper before coding. Test with a small example first.