Description https://leetcode.com/problems/check-if-binary-string-has-at-most-one-segment-of-ones/ Given a binary string s ​​​​​without leading zeros, return true​​​ if s contains at most one contiguous segment of ones. Otherwise, return false. Example 1: Input:…

Description https://leetcode.com/problems/minimum-changes-to-make-alternating-binary-string/ You are given a string s consisting only of the characters ‘0’ and ‘1’. In one operation, you can change any ‘0’ to ‘1’ or vice versa.…

Description https://leetcode.com/problems/check-if-one-string-swap-can-make-strings-equal/ You are given two strings s1 and s2 of equal length. A string swap is an operation where you choose two indices in a…

Description https://leetcode.com/problems/replace-all-digits-with-characters/ You are given a 0-indexed string s that has lowercase English letters in its even indices and digits in its odd indices. There is a function shift(c,…

Description https://leetcode.com/problems/detect-capital/ We define the usage of capitals in a word to be right when one of the following cases…

Description https://leetcode.com/problems/word-pattern/ Given a pattern and a string s, find if s follows the same pattern. Here follow means a full match, such that there is a…

Description https://leetcode.com/problems/long-pressed-name/ Your friend is typing his name into a keyboard. Sometimes, when typing a character c, the key might get long pressed, and…

Description https://leetcode.com/problems/number-of-lines-to-write-string/ You are given a string s of lowercase English letters and an array widths denoting how many pixels wide each lowercase English letter is.…

Description https://leetcode.com/problems/rearrange-spaces-between-words/ You are given a string text of words that are placed among some number of spaces. Each word consists of…

Description https://leetcode.com/problems/reverse-only-letters/ Given a string S, return the “reversed” string where all characters that are not a letter stay in the same…