# 2375. Construct Smallest Number From DI String
###### tags: `Leetcode` `Medium` `DI Sequence` `Greedy`
Link: https://leetcode.com/problems/construct-smallest-number-from-di-string/description/
## 思路
思路[参考](https://leetcode.com/problems/construct-smallest-number-from-di-string/solutions/2422380/java-c-python-easy-reverse/)
先把所有数字正常放
然后把每两个```I```中间的数字reverse一下
## Code

class Solution {
    public String smallestNumber(String pattern) {
        StringBuilder ans = new StringBuilder();
        StringBuilder temp = new StringBuilder();
        for(int i=0; i<=pattern.length(); i++){
            temp.append((char)('1'+i));
            if(i==pattern.length() || pattern.charAt(i)=='I'){
                ans.append(temp.reverse());
                temp.setLength(0);
            }
        }
        return ans.toString();
    }
}