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Given a non-negative integer num represented as a string, remove k digits from the number so that the new number is the smallest possible. Note: The l 阅读全文
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Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from letters of sequentially adjacent cell, where "adjac 阅读全文
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1. 深度学习是当前很热门的机器学习算法,在深度学习中,涉及到大量的矩阵相乘,现在需要计算三个稠密矩阵A,B,C的乘积ABC,假设三个矩阵的尺寸分别为m*n,n*p,p*q,且 m<n<p<q,以下计算顺序效率最高的是() A. ABC B. (AC)B C. A(BC) D. 所有效率都相同 解答 阅读全文
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Given an undirected graph, return true if and only if it is bipartite. Recall that a graph is bipartite if we can split it's set of nodes into two ind 阅读全文