C++ :

#include<iostream>
#include<algorithm>
using namespace std;
int p[9]={1,2,3,4,5,6,7,8,9};
int main()
{
	int x,y,z;
	do
	{
		x=p[0]*100+p[1]*10+p[2];
		y=p[3]*100+p[4]*10+p[5];
		z=p[6]*100+p[7]*10+p[8];
		if(2*x==y&&3*x==z)
		{
			cout<<x<<" "<<y<<" "<<z<<endl;
		}
	}while(next_permutation(p,p+9));
	return 0;
}