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1. Commits on Dec 17, 2025

   • Log lowest_common_ancestor_in_bst: 8min, 1 try, mastered

     

     Brian Elinsky

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   • Fix Chapter 13 problem numbers and priorities

     

     Brian Elinsky

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   • Log is_string_permutable_to_palindrome: 5min, 1 try, mastered

     

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   • Log search_first_greater_value_in_bst: 9min, 1 try, mastered

     

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   • Reset search_first_greater_value_in_bst.py to template

     

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   • Log two_sorted_arrays_merge: 6min, 1 try, mastered

     

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2. Commits on Dec 16, 2025

   • Add flashcards for absent value array problem (11.09)

     

     Brian Elinsky

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   • Log absent_value_array: 15min, 1 try, not solved

     

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   • Add itertools to flashcard progress tracking

     

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   • Rename itertools flashcard folder from 46 to 20

     

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   • Log search_shifted_sorted_array: 15min, 1 try, mastered

     

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   • Log sort_almost_sorted_array: 16min, 1 try, mastered

     

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   • Log lru_cache: 14min, 1 try, mastered

     

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   • Log kth_largest_in_array: 12min, 1 try, mastered

     

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   • Log kth_largest_in_array: 12min, 1 try, independent

     

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   • Log flashcard drill: pathlib-ops

     

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   • Log flashcard drill: pathlib-basics

     

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   • Log flashcard drill: csv

     

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3. Commits on Dec 15, 2025

   • Update chapter 9 priorities: 9.13→P4, 9.11→P3, 9.16→P4

     

     Brian Elinsky

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   • Fix chapter 9 problem numbers to match EPI book, add tree_preorder

     

     Brian Elinsky

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   • Add flashcards for tree_from_preorder_inorder

     

     Brian Elinsky

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   • Add flashcards for is_tree_symmetric

     

     Brian Elinsky

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   • Log tree_from_preorder_inorder: 10 min, used hints, optimal

     

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   • Log is_tree_symmetric: 8 min, used hints, optimal

     

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   • Log circular_queue: 28 min, used hints

     

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   • Log int_square_root: 4 min, mastered

     

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   • Log k_closest_stars: 7 min, mastered

     

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   • Log flashcard drill: ordereddict

     

     Brian Elinsky

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   • Log flashcard drill: dicts-basics

     

     Brian Elinsky

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   • Update README for Dec 15

     

     Brian Elinsky

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4. Commits on Dec 14, 2025

   • Increase mastery target from 90% to 100%

     

     Brian Elinsky

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   • Add historical data to burndown chart with connected daily dots

     

     Brian Elinsky

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   • Log evaluate_rpn: 10 min, solved with hints

     

     Brian Elinsky

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   • Log delete_kth_last_from_list: 8 min, mastered

     

     Brian Elinsky

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   • Log do_terminated_lists_overlap: 11 min, mastered

     

     Brian Elinsky

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