problem0660

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Published: Jul 25, 2019 License: MIT Imports: 0 Imported by: 0

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660. Remove 9

题目

Start from integer 1, remove any integer that contains 9 such as 9, 19, 29...

So now, you will have a new integer sequence: 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, ...

Given a positive integer n, you need to return the n-th integer after removing. Note that 1 will be the first integer.

Example 1:

Input: 9
Output: 10

Hint: n will not exceed 9 x 10^8.

解题思路

其实就是把10进制转换成9进制。

总结

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