C++ Py3 hashmap與binary search解Leetcode 1865 Finding Pairs With a Certain...

C++ Py3 hashmap與binary search解Leetcode 1865 Finding Pairs With a Certain Sum

基本上用 hashmap。解釋為什麼要使用排序和二元搜尋找來優化程式碼

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Basically use hashmap. Explain why  one should use sorting and binary search to optimize the code.

[codes on Leetcode]https://leetcode.com/problems/finding-pairs-with-a-certain-sum/solutions/6925404/unordered-map-sort-binary-search-c-37ms-99-37-py3-97-45/

[Leetcode playlist]https://www.youtube.com/watch?v=LJPL-Ukxf8w&list=PLYRlUBnWnd5IdDHk2BjqXwesydU17z_xk