Given a matrix of m x n elements (m rows, ncolumns), return all elements …

Distinct Subsequences Given a string S and a string T, count the number of distinct subsequences of T in S. A …

  Write a SQL query to get the nth highest salary from the Employee table. +----+----…

  Assume you have an array of length n initialized with all 0‘s and are given k update operations. …

  Given two strings s1, s2, find the lowest ASCII sum of deleted characters to make two strings equa…

  A virus is spreading rapidly, and your task is to quarantine the infected area by installing walls. The…

题目： Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C …

  Given n non-negative integers a1, a2, …, an, where each represents a point at coordinate (i, ai).…

  A linked list is given such that each node contains an additional random pointer which could point to a…

  You are given n pairs of numbers. In every pair, the first number is always smaller than the …

题目： Given a binary tree and a sum, find all root-to-leaf paths where each path’s sum equals the given su…

Best Meeting Point A group of two or more people wants to meet and minimize the total travel distance. You are…