zhang__liuchen的博客

Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note: Assume we are dea...

https://leetcode.com/problems/remove-element/ 题目 Given an array nums and a value val, remove all instances of that value in-place and return the new length. Do not allocate extra space for another ar...

https://leetcode.com/problems/remove-duplicates-from-sorted-array/ 题目 Given a sorted array nums, remove the duplicates in-place such that each element appear only once and return the new length. Do n...

https://leetcode.com/problems/merge-two-sorted-lists/ 题目 Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. ...

https://leetcode.com/problems/valid-parentheses/ 题目 Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if:...

https://leetcode.com/problems/longest-common-prefix/ 题目描述 Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "...

题目链接 Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the ...

https://leetcode.com/problems/roman-to-integer/ Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Symbol Value I 1 V 5 X 1...

Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Input: 121 Output: true Example 2: Input: -121 Output: false Expl...

https://leetcode.com/problems/search-insert-position/ 题目 Given 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 inserte...