LeetCode 69. Sqrt(x)
Description Implement int sqrt(int x). Compute and return the square root of x, where x is guaranteed to be a non-negative integer. Since the…
Category: LeetCode
LeetCode 412. Fizz Buzz
Description https://leetcode.com/problems/fizz-buzz/ Write a program that outputs the string representation of numbers from 1 to n. But for multiples of three…
LeetCode 34. Find First and Last Position of Element in Sorted Array
Description Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value. Your algorithm’s…
LeetCode 144. Binary Tree Preorder Traversal
Description https://leetcode.com/problems/binary-tree-preorder-traversal/description/ Given a binary tree, return the preorder traversal of its nodes’ values. For example: Given binary tree {1,#,2,3}, 1 \ 2…
LeetCode 35. Search Insert Position
Description Given a sorted array of distinct integers and a target value, return the index if the target is found.…
LeetCode 122. Best Time to Buy and Sell Stock II
Description https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/description/ Say you have an array for which the ith element is the price of a given stock on day i. Design…
LeetCode 121. Best Time to Buy and Sell Stock
Description https://leetcode.com/problems/best-time-to-buy-and-sell-stock/ You are given an array prices where prices[i] is the price of a given stock on the ith day. You want to maximize your…
LeetCode 20. Valid Parentheses
Description https://leetcode.com/problems/valid-parentheses/ Given a string s containing just the characters ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[‘ and ‘]’, determine if the input string is valid. An input string is valid…
LeetCode 12. Integer to Roman
Description https://leetcode.com/problems/integer-to-roman/ Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from…
LeetCode 9. Palindrome Number
Description https://leetcode.com/problems/palindrome-number/ Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1:…