题目: Your task is to add up letters to one letter. The function will be given a variable amount of arguments, each one being a letter to add. Notes: Letters will always be lowercase. Letters can overflow (see second to last example of the description)…

题目: Complete the solution so that it returns true if the first argument(string) passed in ends with the 2nd argument (also a string). Examples: solution('abc', 'bc') # returns true solution('abc', 'd') # returns false 解题办法: def solution(string, endin…

Assume you have an array of length n initialized with all 0's and are given k update operations. Each operation is represented as a triplet: [startIndex, endIndex, inc] which increments each element of subarray A[startIndex ... endIndex] (startIndex…

Assume you have an array of length n initialized with all 0's and are given k update operations. Each operation is represented as a triplet: [startIndex, endIndex, inc] which increments each element of subarray A[startIndex ... endIndex] (startIndex…

题目: When you sign up for an account somewhere, some websites do not actually store your password in their databases. Instead, they will transform your password into something else using a cryptographic hashing algorithm. After the password is transfo…

原题: This time we want to write calculations using functions and get the results. Let's have a look at some examples: seven(times(five())) # must return 35 four(plus(nine())) # must return 13 eight(minus(three())) # must return 5 six(divided_by(two())…

原题: Your job is to write a function which increments a string, to create a new string. If the string already ends with a number, the number should be incremented by 1. If the string does not end with a number. the number 1 should be appended to the n…

题目: Complete the function which takes two arguments and returns all numbers which are divisible by the given divisor. First argument is an array of numbers and the second is the divisor. Example divisible_by([1, 2, 3, 4, 5, 6], 2) == [2, 4, 6] 解题方法:…

题目: Summation Write a program that finds the summation of every number from 1 to num. The number will always be a positive integer greater than 0. For example: summation(2) -> 3 1 + 2 summation(8) -> 36 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 解题方法: 很简单的题目: de…

题目: Consider an array of sheep where some sheep may be missing from their place. We need a function that counts the number of sheep present in the array (true means present). For example, [True, True, True, False, True, True, True, True , True, False…