给你两个整数 numBottles 和 numExchange 。 numBottles 代表你最初拥有的满水瓶数量。在一次操作中，你可以执行以下操作之一：

You are given two integers numBottles and numExchange. numBottles represents the number of full water bottles that you initially have. In one operation, you can perform one of the following operations:

给你两个长度分别为 n 和 m 的整数数组 skill 和 mana 。

You are given two integer arrays, skill and mana, of length n and m, respectively. In a laboratory, n wizards must brew m potions in order. Each potion has a mana capacity mana[j] and must pass through all the wizards sequentially to be brewed properly. The…

存在一种仅支持 4 种操作和 1 个变量 X 的编程语言：

There is a programming language with only four operations and one variable X:

给你一个由数字组成的字符串 s 。重复执行以下操作，直到字符串恰好包含 两个 数字：

You are given a string s consisting of digits. Perform the following operation repeatedly until the string has exactly two digits:

你的任务是为一个很受欢迎的银行设计一款程序，以自动化执行所有传入的交易（转账，存款和取款）。银行共有 n 个账户，编号从 1 到 n 。每个账号的初始余额存储在一个下标从 0 开始的整数数组 balance 中，其中第 (i + 1) 个账户的初始余额是 balance[i] 。 请你执行所有 有效的 交易。如果满足下面全部条件，则交易 有效 ：

You have been tasked with writing a program for a popular bank that will automate all its incoming transactions (transfer, deposit, and withdraw). The bank has n accounts numbered from 1 to n. The initial balance of each account is stored in a 0-indexed integer…