easy to understand
IntuitionApproachComplexity
Time complexity:

Space complexity:
Code
# Intuition
<!-- Describe your first thoughts on how to solve this problem. -->

# Approach
<!-- Describe your approach to solving the problem. -->

# Complexity
- Time complexity:
<!-- Add your time complexity here, e.g. $$O(n)$$ -->

- Space complexity:
<!-- Add your space complexity here, e.g. $$O(n)$$ -->

# Code
```cpp []
class Solution {
public:
    string makeSmallestPalindrome(string &s) {
        int left = 0;
        int right = s.size() -1 ;
        while (right>left){
            if (s[left]!=s[right]){
                if(s[left]>s[right]) s[left]=s[right];
                else s[right]=s[left];
            }
            --right;
            ++left;
        }
        return s;
    }
};
```
['C++']