 submission beat 91% of other submissions' runtime|| tc->o(n) || sc->o(1)||
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:
    bool hasSameDigits(string s) {
       

       while(s.size()>2){
        string c = "";

        for(int i =0 ;i<s.size()-1 ; i++){ 
            int a = s[i]-'0';  //convert to the integer 
            int b = s[i+1]-'0';//convert to the integer

            int sum = (a+b)%10;
            c.push_back(sum + '0'); //convert to string

       }

                 s = c;

       }

       return s[0] == s[1];
    }
};
```
['C++']