2006年9月9日
f(n) = n
摘要： 题目：Consider a function which, for a given whole number n, returns the number of ones required when writing out all numbers between 0 and n. For example, f(13)=6. Notice that f(1)=1. What is the next ... 阅读全文
posted @ 2006-09-09 20:06 Jailu 阅读(1095) 评论(2) 推荐(0) 编辑
13个数的问题
摘要： 题目：Give 7 numbers, range from 0-13. The number of 0 is uncertain, other numbers can appear only once. 0 can be converted to any number. Please check whether or not it contains 5 continuous numbers 取到7... 阅读全文
posted @ 2006-09-09 03:14 Jailu 阅读(330) 评论(3) 推荐(0) 编辑