Usagi1. Two Sum(Easy)Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.Jul 29Jul 29
Usagi13. Roman to Integer(Easy)Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M.Jul 22Jul 22
Usagi55. Jump Game(Easy)You are given an integer array nums. You are initially positioned at the array's first index, and each element in the array represents your…Jul 1Jul 1
Usagi27. Remove Element(Easy)Given an integer array nums and an integer val, remove all occurrences of val in nums in-place. The order of the elements may be changed…Jul 1Jul 1
Usagi88. Merge Sorted Array(Easy)You are given two integer arrays nums1 and nums2, sorted in non-decreasing order, and two integers m and n, representing the number of…Jul 1Jul 1
Usagi125. Vaild Palindrome(Eady)A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters…Jan 23Jan 23
Usagi169.Majority Element(Easy)Given an array nums of size n, return the majority element.Jan 23Jan 23
Usagi121. Best Time to Buy and Sell Stock(Easy)You are given an array prices where prices[i] is the price of a given stock on the ith day.Jan 23Jan 23
Usagi205. Isomorphic Strings(Easy)Given two strings s and t, determine if they are isomorphic.Jan 19Jan 19
Usagi219. Contains Duplicate II(Easy)Given an integer array nums and an integer k, return true if there are two distinct indices i and j in the array such that nums[i] ==…Jan 19Jan 19
Usagi26. Remove Duplicates from Sorted Array(Easy)Given an integer array nums sorted in non-decreasing order, remove the duplicates in-place such that each unique element appears only once…Jan 19Jan 19
Usagi58. Length of Last Word(Easy)Given a string s consisting of words and spaces, return the length of the last word in the string.Jan 2Jan 2
Usagi28. Find the Index of the First Occurrence in a String(Easy)Given two strings needle and haystack, return the index of the first occurrence of needle in haystack, or -1 if needle is not part of…Jan 2Jan 2
Usagi938. Range Sum of BST(ㄍGiven the root node of a binary search tree and two integers low and high, return the sum of values of all nodes with a value in the…Jul 14, 2023Jul 14, 2023
Usagi530. Minimum Absolute Difference in BST(Easy)Given the root of a Binary Search Tree (BST), return the minimum absolute difference between the values of any two different nodes in the…Jul 14, 2023Jul 14, 2023
Usagi1232. Check If It Is a Straight Line(Easy)You are given an array coordinates, coordinates[i] = [x, y], where [x, y] represents the coordinate of a point. Check if these points make…Jul 14, 2023Jul 14, 2023
Usagi326. Power of Three(Easy)Given an integer n, return true if it is a power of three. Otherwise, return false.Jun 29, 2023Jun 29, 2023
Usagi404. Sum of Left Leaves(EasyGiven the root of a binary tree, return the sum of all left leaves.Jun 29, 2023Jun 29, 2023
Usagi257. Binary Tree Paths(Easy)Given the root of a binary tree, return all root-to-leaf paths in any order.Jun 29, 2023Jun 29, 2023
