Level 5 · Interview mastery
Free Mixed sets lessons
4 lessons, about 44 minutes in all. Each teaches one idea with a visual, then gives you one problem built for it. Read the lessons here, then create a free account to solve the problems and keep your progress.
Stage 0Set 1
- Balanced bitsThe longest stretch with as many 0s as 1s.12 min
- Build a palindromeThe longest palindrome you can make from a pile of letters.10 min
- Neighbours in valueThe largest group of values whose max and min differ by exactly 1.10 min
- Trains at the stationFind the most trains in the station at once by sorting arrivals and departures separately and sweeping along time.12 min
There’s more after this
These are the opening stages of Mixed sets. The full path climbs on to harder problems and a mastery test. Create a free account and we’ll keep your place.
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