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Practice

Marking Array Set

⭐ beginner~70 min of coding5 challenges

Five frequency problems including the tie rule, duplicate finding, missing number, multiset equality, and pair counting.

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What you will practice

  1. Most Frequent Value⭐ beginner
  2. Find the Duplicate⭐ beginner
  3. The Missing Number⭐ beginner
  4. Same Multiset?⭐⭐ intermediate
  5. Pair Summing to K⭐⭐ intermediate

Need the concept first? Re-read the lesson.