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热度指数:1555
时间限制:C/C++ 1秒,其他语言2秒
空间限制:C/C++ 64M,其他语言128M
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算法知识视频讲解
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. For example, given N being 12, there are five 1's in 1, 10, 11,
and 12.
输入描述:
Each input file contains one test case which gives the positive N (<=230).
输出描述:
For each test case, print the number of 1's in one line.