zhang__liuchen的博客

Given a 32-bit signed integer, reverse digits of an integer.Example 1:Input: 123Output: 321Example 2:Input: -123Output: -321Example 3:Input: 120Output: 21Note: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 ValueI 1V 5X 1...

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

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...