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LeetCode

Problem notes and reusable patterns from LeetCode practice.

Topics​

  • Two pointers, sliding window, and prefix sums
  • Graph traversal: BFS, DFS, and union-find
  • Dynamic programming patterns
  • Binary search on the answer
  • Heap and greedy strategies

Template​

  • Pattern
  • Constraints
  • First wrong intuition
  • Correct approach
  • Complexity
  • Similar problems