Week 4

Fourth week of the 30-day plan. Focus: systematic problem-solving, timed practice, pattern review, final mocks, revision, and interview readiness.

Days and files

Day	Topic	File
22	Systematic problem-solving approach	day-22-systematic-problem-solving-approach..md
23	Practice with timed challenges	day-23-practice-with-timed-challenges.md
24	Focus on company-specific questions (e.g. Google)	ay-24-focus-on-google-specific-questions.md (Day 24)
25	Review common patterns in problems	day-25-review-common-patterns-in-problems..md
26	Final mock interviews (2nd session)	day-26-final-mock-interviews-2nd-session.md
27	Revise key concepts and mistakes	day-27-revise-key-concepts-and-mistake.md
28	Relaxation techniques before interviews	day-28-relaxation-techniques-before-interviews.md

Day 29 (Final review) and Day 30 (Questions for interviewers) are in the main 30-day plan; use Foundations Quick Revision sections and SDE3_DSA_ROADMAP checklist for those.

SDE-3 depth

• Patterns: patterns/README.md, patterns/two-pointers-sliding-window.md, patterns/dp-advanced.md

• Roadmap and mock strategy: SDE3_DSA_ROADMAP.md

• Top 20 SDE-3 problems: sde-3-guide/sde-3-guide.md