class Solution {
    public List<Integer> twoOutOfThree(int[] nums1, int[] nums2, int[] nums3) {
        ArrayList<Integer> ans=new ArrayList<Integer>();
        int[] helper1=new int[101];
        int[] helper2=new int[101];
        int[] helper3=new int[101];
        
        for(int num:nums1)
            helper1[num]=1;
        
        for(int num:nums2)
            helper2[num]=1;
        
        for(int num:nums3)
            helper3[num]=1;
        
        for(int i=0; i<helper1.length; i++){
            if(helper1[i]+helper2[i]+helper3[i]>1)
                ans.add(i);
        }
        
        return ans;
    }
}