Recursively remove all adjacent duplicates

//{ Driver Code Starts
// Initial Template for C++

#include <bits/stdc++.h>
using namespace std;

// } Driver Code Ends
//User function template for C++

class Solution{
public:
   string rem(string s)
   {
       string ans="";
       int n=s.length();
       int i=0;
       while(i<n)
       {
           if(i<n-1 && s[i]==s[i+1])
           {
               while(i<n-1 && s[i]==s[i+1])
               {
                   i++;
               }

           }
           else
           {
               ans+=s[i];
           }
           i++;
       }
       return ans;
   }
   string rremove(string s){
         string s1;
         while(s.size() != s1.size())
         {
             s1=s;
             s= rem(s);
         }
         return s;
    }
};

//{ Driver Code Starts.

int main() {
    int t;
    string tc;
    getline(cin, tc);
    t = stoi(tc);
    while (t--) {
        string s;
        getline(cin, s);
        Solution ob;
        cout << ob.rremove(s) << "\n";
    }
    return 0;
}
// } Driver Code Ends