ChristmasTreeDecorationDiv2.cpp

class ChristmasTreeDecorationDiv2 {
    public:
    int solve(vector<int> col, vector<int> x, vector<int> y) {
      int cnt=0;
      for(int i=0;i<x.size();i++)
	{
	  if(col[x[i]-1]!=col[y[i]-1])
	    cnt++;
	}
        return cnt;
    }
};