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Description https://leetcode.com/problems/range-sum-query-immutable/ Given an integer array nums, find the sum of the elements between indices left and right inclusive, where (left <= right). Implement the NumArray class: NumArray(int[]…
Description https://leetcode.com/problems/guess-number-higher-or-lower/ We are playing the Guess Game. The game is as follows: I pick a number from 1 to n. You have…
Description https://leetcode.com/problems/add-binary/ Given two binary strings a and b, return their sum as a binary string. Example 1: Input: a = “11”, b =…
Description https://leetcode.com/problems/rotate-string/ We are given two strings, A and B. A shift on A consists of taking string A and moving the leftmost character to the rightmost position.…
Description https://leetcode.com/problems/find-smallest-letter-greater-than-target/ Given a list of sorted characters letters containing only lowercase letters, and given a target letter target, find the smallest element…
Description https://leetcode.com/problems/find-pivot-index/ Given an array of integers nums, calculate the pivot index of this array. The pivot index is the index where the sum of…
Description https://leetcode.com/problems/second-largest-digit-in-a-string/ Given an alphanumeric string s, return the second largest numerical digit that appears in s, or -1 if it does not exist. An alphanumericstring is a…
Description https://leetcode.com/problems/confusing-number/ Given a number N, return true if and only if it is a confusing number, which satisfies the following condition: We can…
Description https://leetcode.com/problems/length-of-last-word/ Given a string s consists of some words separated by spaces, return the length of the last word in the string. If…
Description https://leetcode.com/problems/remove-duplicates-from-sorted-list/ Given the head of a sorted linked list, delete all duplicates such that each element appears only once. Return the linked list sorted as…