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Use combinatorics and dynamic programming to efficiently count subsequences that satisfy the “good” property. 🔗 Problem Link: https://www.codechef.com/problems/GOODSUB7?utm_source=youtube&utm_medium=video&utm_campaign=contest_solutions_2025&utm_content=starter_200 Learn DSA roadmap: https://www.codechef.com/roadmap/data-structures-and ...
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