StubbornAnt的博客

题目Given a linked list, remove the nth node from the end of list and return its head.For example, Given linked list: 1->2->3->4->5, and n = 2.After removing the second node from the end, the linked list

二分查找刷题笔录leetcode 35 Search Insert PositionQuestionGiven a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in ord

leetcode 排列组合Permutation Combinations

QuestionGiven a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.SolutionIf you have to store some thing, but the problem requires in place solution, you may conside

IntroductionIn questions related to linked list, fast and slow pointer solution is very common. Fast pointer step two and Slow pointer step one. Always we can the regular through draw a picture and mat

QuestionThere are n bulbs that are initially off. You first turn on all the bulbs. Then, you turn off every second bulb. On the third round, you toggle every third bulb (turning on if it’s off or turni

300. Longest Increasing SubsequenceQuestionGiven an unsorted array of integers, find the length of longest increasing subsequence.For example, Given [10, 9, 2, 5, 3, 7, 101, 18], The longest increasi

题目Given two strings s and t, determine if they are isomorphic.Two strings are isomorphic if the characters in s can be replaced to get t.All occurrences of a character must be replaced with another cha