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    vector reverseArray(vector a) {

       //solution approach 1
     reverse(a.begin(),a.end());
     return a;
    
      //solution appraoch 2
    //  int n=size(a);
    //  vector<int> ans;
    //  for(int i=n-1;i>=0;i--)
    //  {
    //     ans.push_back(a[i]);
    //  }
    //  return ans;
    

    }