2545. Sort the Students by Their Kth Score

class Solution {
public:
    vector<vector<int>> sortTheStudents(vector<vector<int>>& score, int k) 
    {
        for(int i=0; i<score.size()-1; i++ )
        {
            for( int j = i+1; j<score.size(); j++)
            {
                if(score[i][k]<score[j][k])
                {
                    swap ( score[i], score[j] );
                }
                    
            }
        }
        return score;
    }
};