摘要：题目： A single positive integer i is given. Write a program to find the digit located in the position i in the sequence of number groups S1S2...Sk. Each 阅读全文

摘要：题目： Transmitting and memorizing information is a task that requires different coding systems for the best use of the available space. A well known sys 阅读全文

摘要：题目： "Well, it seems the first problem is too easy. I will let you know how foolish you are later." feng5166 says. "The second problem is, given an pos 阅读全文

摘要：题目： 假设有x1个字母A， x2个字母B,..... x26个字母Z，同时假设字母A的价值为1，字母B的价值为2,..... 字母Z的价值为26。那么，对于给定的字母，可以找到多少价值<=50的单词呢？单词的价值就是组成一个单词的所有字母的价值之和，比如，单词ACM的价值是1+3+14=18，单词 阅读全文