> For the complete documentation index, see [llms.txt](https://dfine.gitbook.io/leetcode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dfine.gitbook.io/leetcode/942.di_string_match.md).

# 942.Di String Match

**942.Di String Match**

> 给定只含 "I"（增大）或 "D"（减小）的字符串 S ，令 N = S.length。 返回 \[0, 1, ..., N] 的任意排列 A 使得对于所有 i = 0, ..., N-1，都有： 如果 S\[i] == "I"，那么 A\[i] < A\[i+1] 如果 S\[i] == "D"，那么 A\[i] > A\[i+1]

```
示例 1：

输出："IDID"
输出：[0,4,1,3,2]
示例 2：

输出："III"
输出：[0,1,2,3]
示例 3：

输出："DDI"
输出：[3,2,0,1]

提示：
1 <= S.length <= 1000
S 只包含字符 "I" 或 "D"。
```

方法： D表示大于，初始时候从0到N，全为I，当中间出现D的时候，可以将最大的n个数放在n个D处，满足条件。第一个D出现的位置是最大值，第二个是次大值...以此类推，代码如下：

```
class Solution {
public:
    vector<int> diStringMatch(string S) {
        vector<int> key;
        int max=S.length(),min=0;
        for(int i=0;i<S.length()+1;i++)
        {
            if(S[i]=='D')
                key.push_back(max--);
            else
                key.push_back(min++);
           }

        return key;
    }
};
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://dfine.gitbook.io/leetcode/942.di_string_match.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.