摘要： Given a non-negative integer N, your task is to compute the sum of all the digits of N, and output every digit of the sum in English.Input Specificati 阅读全文

摘要： 题目 A family hierarchy is usually presented by a pedigree tree. Your job is to count those family members who have no child.Input Specification: Each i 阅读全文

摘要： 题目： As an emergency rescue team leader of a city, you are given a special map of your country. The map shows several scattered cities connected by som 阅读全文