Jan 10, 2021 · In this post, we will learn how to solve LeetCode's Shifting Letters Problem and will implement its solution in Java. We have a string S of lowercase letters, and an integer array …

To Lower Case - Given a string s, return the string after replacing every uppercase letter with the same lowercase letter.

Mar 7, 2019 · The questions was: Given an array A of strings made only from lowercase letters, return a list of all characters that show up in all strings within the list (including duplicates). For …

Write a function that reverses a string. The input string is given as an array of characters char[].

Reverse String II, difficulty: Easy. Given a string s and an integer k, reverse the first k characters for every 2k characters counting from the start of the string. If there are fewer than k …

Dec 9, 2024 · Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order. A mapping of …

Aug 5, 2021 · Given a string s, find the first non-repeating character in it and return its index. If it does not exist, return -1. EXAMPLE : 1. Input: s = "leetcode" Output: 0. EXAMPLE :2. Input: s …

Reverse Only Letters - Given a string s, reverse the string according to the following rules: * All the characters that are not English letters remain in the same position. * All the English letters …

This repository contains solutions to LeetCode's 75 Essential & Trending Problems, all implemented in Java. Must-do problem list for interview prep: The problems selected in this …

Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words. For example, given s = "leetcode", dict = …