You are given an integer array representing the scores of students in an exam. Your task is to form a non-empty group of students such that the group’s strength, defined as the product of their scores, is maximized. The goal is to return the maximum possible strength that can be achieved by choosing an optimal group of students.
You are given a binary string s of length n. You can perform two types of operations: (1) Flip all characters from index 0 to i (inclusive), with a cost of i + 1. (2) Flip all characters from index i to n - 1 (inclusive), with a cost of n - i. The goal is to return the minimum cost required to make all the characters in the string equal (either all 0s or all 1s).
You are given a string s consisting of lowercase English letters. You can perform the operation of replacing every letter of a selected non-empty substring with the preceding letter in the alphabet. Your task is to return the lexicographically smallest string possible after performing the operation.
You are given a 0-indexed array ’nums’ consisting of positive integers. You can repeatedly perform an operation where you choose an index ‘i’ such that ’nums[i] <= nums[i + 1]’, replace ’nums[i + 1]’ with ’nums[i] + nums[i + 1]’, and remove ’nums[i]’. Your task is to determine the largest possible value that can remain in the array after performing any number of operations.
Given three strings ‘a’, ‘b’, and ‘c’, find a string that contains all three of these strings as substrings and has the minimum possible length. If there are multiple such strings, return the lexicographically smallest one.
You are given an array nums and an integer m. You need to determine if it’s possible to split the array into n subarrays of size 1, following the rules that each subarray must either have length 1 or have a sum of elements greater than or equal to m.