10 2019 档案
摘要：Given a string of and parentheses, we add the minimum number of parentheses ( or , and in any positions ) so that the resulting parentheses string is
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摘要：This page is used to inform visitors regarding my policies with the collection, use, and disclosure of Personal Information if anyone decided to use m
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摘要：Your music player contains different songs and she wants to listen to (not necessarily different) songs during your trip. You create a playlist so tha
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摘要：A complete binary tree is a binary tree in which every level, except possibly the last, is completely filled, and all nodes are as far left as possibl
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摘要：Given a circular array C of integers represented by , find the maximum possible sum of a non empty subarray of C. Here, a circular array means the end
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摘要：Given a string , return the "reversed" string where all characters that are not a letter stay in the same place, and all letters reverse their positio
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摘要：In a 2D grid of s and s, we change at most one to a . After, what is the size of the largest island? (An island is a 4 directionally connected group o
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摘要：We are given two arrays and of words. Each word is a string of lowercase letters. Now, say that word is a subset of word if every letter in occurs in
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摘要：Let's define a function that returns the number of unique characters on , for example if then , ,`"C" "O" "D" s`, therefore . On this problem given a
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