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Description: Given a string s and a string array dictionary, return the longest string in the dictionary that can be formed by deleting some of the gi 阅读全文
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Description: There are some spherical balloons spread in two-dimensional space. For each balloon, provided input is the start and end coordinates of t 阅读全文
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Description: Given two integer arrays nums1 and nums2, return an array of their intersection. Each element in the result must appear as many times as 阅读全文
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Description: Given an array of integers citations where citations[i] is the number of citations a researcher received for their ith paper, return comp 阅读全文
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Description: Given a list of non-negative integers nums, arrange them such that they form the largest number. Note: The result may be very large, so y 阅读全文
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Description: Given the head of a linked list, return the list after sorting it in ascending order. Follow up: Can you sort the linked list in O(n logn 阅读全文
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Description: Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Symbol Value I 1 V 5 X 10 L 50 C 100 D 500 M 1000 For 阅读全文
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Description: Given a reference of a node in a connected undirected graph. Return a deep copy (clone) of the graph. Each node in the graph contains a v 阅读全文
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Description: Given the root of a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered fr 阅读全文
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Description: Given an m x n 2D binary grid grid which represents a map of '1's (land) and '0's (water), return the number of islands. An island is sur 阅读全文