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HackerRank: Equal Christy is interning at HackerRank. One day she has to distribute some chocolates to her colleagues. She is biased towar...
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https://leetcode.com/problems/find-all-anagrams-in-a-string/ Given a string s and a non-empty string p , find all the start indices ...
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Related: Design Sparse Matrix http://www.1point3acres.com/bbs/thread-137068-1-1.html 设计一个SparseVector class，包含set(long idx, int val), ge...
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arithmeticprogressions - codetrick An arithmetic progression is a sequence of the form a, a+b, a+2b, ..., a+nb where n=0,1,2,3,... . For ...
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Find n'th Magic Number - GeeksforGeeks A magic number is defined as a number which can be expressed as a power of 5 or sum of unique p...
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https://www.hackerrank.com/challenges/castle-on-the-grid You are given a grid with both sides equal to N N . Rows and columns are n...
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https://leetcode.com/problems/friend-circles There are N students in a class. Some of them are friends, while some are not. Their frien...
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https://leetcode.com/problems/minimum-genetic-mutation/ A gene string can be represented by an 8-character long string, with choices from ...
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http://bookshadow.com/weblog/2016/10/16/leetcode-word-squares/ Given a set of words (without duplicates) , find all word squares you c...
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https://leetcode.com/problems/target-sum/ You are given a list of non-negative integers, a1, a2, ..., an, and a target, S. Now you have 2...
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