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Week 2: WEEK 2 – Counting, Prefix Sum & Hash Maps
Focus: Codility Lesson 3–5, hash maps in TypeScript
Day 8: Counting Elements
Topics:
- boolean arrays vs hash maps
Tasks to Complete:
Notes:
Day 9: Counting Practice
Tasks to Complete:
Notes:
Day 10: Prefix Sums (Very Important)
Topics:
- Prefix sum logic
Tasks to Complete:
Notes:
Day 11: Prefix Sums II
Topics:
- Subarray sums
Tasks to Complete:
Notes:
Day 12: Hash Map Practice
Topics:
- Review TypeScript Map vs Object
Tasks to Complete:
Notes:
Day 13: Mini Review
Topics:
- Revisit prefix sums
Tasks to Complete:
Notes:
Day 14: MOCK TEST (45 min)
Topics:
- Target: 70%+