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class Solution {
public:
    void moveZeroes(vector<int>& arr) 
    {
        int n=arr.size();
       int pos=0;
       for(int i=0 ; i<n ; i++)
       {
           if(arr[i]!=0)
           {
               swap(arr[i],arr[pos]);
               pos++;
           }
       }    
    }
};
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