一本书的页码从自然数1开始顺序编码直到自然数n.书的页码按照通常的习惯编排,每个页码都不含多余的前导数字0.例如,第6页用数字6表示,而不是06或006等.数字计数问题要求对给定的总页码n,计算出书的全部页码中分别用到多少次数字0,1,2,……9。 -Page of a book from the coding sequence of natural numbers starting at 1 until the natural number n. page book arranged according to the usual custom, each page are free of extra leading digit 0. For example, on page 6 that with the number 6, not 06 or 006 and so on. Digital counting the total required for a given page number n, to calculate all the books used, respectively, the number of page numbers 0,1,2, ... ... 9.