Remove All Adjacent Duplicates In String

class Solution {
public:
	string removeDuplicates(string s) {

		string ans;
		ans.push_back(s[0]);

		for(int i=1 ; i<s.length() ; i++){

			if(s[i] == ans.back()){
				ans.pop_back();
			}
			else{
				ans.push_back(s[i]);
			}
		}

		return ans;
	}
};