2020年3月1日
PAT 1049 Counting Ones (30分)
摘要： The task is simple: given any positive integer N , you are supposed to count the total number of 1's in the decimal form of the integers from 1 to N . 阅读全文
posted @ 2020-03-01 23:31 阳离子 阅读(138) 评论(0) 推荐(0) 编辑