coding_solution/Non Repeating Character at main · Paras022/coding_solution · GitHub

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


 // } Driver Code Ends


class Solution
{
    public:
    //Function to find the first non-repeating character in a string.
    char nonrepeatingCharacter(string S)
    {
       //Your code here
       for(int i=0;i<S.length();i++)
       {
           int c=0;
           for(int j=0;j<S.length();j++)
           {
               if(S[i]==S[j])
                {
                    c++;
                }
                if(c>1)
                break;

           }
           if(c==1)
           return S[i];
       }

       return '$';

    }

};

// { Driver Code Starts.

int main() {

	int T;
	cin >> T;

	while(T--)
	{

	    string S;
	    cin >> S;
	    Solution obj;
        char ans = obj.nonrepeatingCharacter(S);

        if(ans != '$')
	    cout << ans;
        else cout << "-1";

        cout << endl;

	}

	return 0;
}
  // } Driver Code Ends