Given a string s, return the number of unique non-empty substrings of s that are present in the infinite wraparound string ‘abcdefghijklmnopqrstuvwxyz’.
Given an array of binary strings strs and two integers m and n, return the size of the largest subset of strs such that there are at most m zeros and n ones in the subset.
You are given an integer array nums. Two players, Player 1 and Player 2, take turns to pick numbers from either end of the array. Each player adds the selected number to their score. The goal is to determine if Player 1 can win the game. Player 1 wins if they have a higher score or if the scores are tied.
You are given an integer array nums and an integer target. You must build an expression by adding ‘+’ or ‘-’ before each element in nums and concatenate them to form an expression. Return the number of different expressions that result in the target value.
The Fibonacci sequence is a series of numbers where each number is the sum of the two preceding ones, starting from 0 and 1. Given an integer n, return the nth Fibonacci number.
Given a string s, return the length of the longest palindromic subsequence in s. A subsequence is a sequence derived by deleting some or no elements without changing the order of the remaining elements.
