(1)讲的明白，但写的明白吗？ - SegmentFault



(1)讲的明白，但写的明白吗？ - SegmentFault

一本书的页码从自然数1开始编码直到自然数n，按照通常的习惯，每个页码都不包含多余的前导数字0，例如第6页用数字6而不是06或者006表示。现在给定表示书的总页码的十进制整数n(1 =< n <= 10^9)，编程计算书的全部页码中分别用到多少次数字0, 1, 2, 3, 4, 5, 6, 7, 8, 9。


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