文件名称:count_num
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数字计数问题：
一本书的页码从自然数1开始顺序编码到N。
页码按照通常的习惯编排，即每个页码不能含多余的前倒数0，
例如，第2页的页码为2，不能是02、002等。
数字计数问题要求从键盘输入页数N，
输出全书页码中分别用到0~9的数字的次数。-Digital counting problem:
The pages of a book the natural number coding to N 1 began to order.
Page number according to the usual habits, the former bottom of each page number cannot contain extra 0,
Page 2 page number is 2, for example, cannot be 02, 002, etc.
Digital counting problems require input the keyboard page number N,
Output the book page Numbers, respectively, using the number of 0 ~ 9 Numbers.
一本书的页码从自然数1开始顺序编码到N。
页码按照通常的习惯编排，即每个页码不能含多余的前倒数0，
例如，第2页的页码为2，不能是02、002等。
数字计数问题要求从键盘输入页数N，
输出全书页码中分别用到0~9的数字的次数。-Digital counting problem:
The pages of a book the natural number coding to N 1 began to order.
Page number according to the usual habits, the former bottom of each page number cannot contain extra 0,
Page 2 page number is 2, for example, cannot be 02, 002, etc.
Digital counting problems require input the keyboard page number N,
Output the book page Numbers, respectively, using the number of 0 ~ 9 Numbers.
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count_num.py