C++RMQ算法—————A Magic Lamp

本文介绍了一道关于使用C++解决旅行者Kiki遇到的问题,她需要找到一种方法,从一个长整数中删除m个数字,使得剩余数字组成的整数最小。该问题可以转化为求数列中删去m个元素后的最小值,通过RMQ算法来求解。文章详细讲解了思路,并提供了代码实现。

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题目描述:

Kiki likes traveling. One day she finds a magic lamp, unfortunately the genie in the lamp is not so kind. Kiki must answer a question, and then the genie will realize one of her dreams. 
The question is: give you an integer, you are allowed to delete exactly m digits. The left digits will form a new integer. You should make it minimum. 
You are not allowed to change the order of the digits. Now can you help Kiki to realize her dream? 

输入:

There are several test cases. 
Each test case will contain an integer you are given (which may at most contains 1000 digits.) and the integer m (if the integer contains n digits, m will not bigger then n). The given integer will not contain leading zero. 

输出:

For each case, output the minimum result you can get in one line. 
If the result contains leading zero, ignore it. 

样例输入:

178543 4
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