multimapとlinklet

	trk = new Track[4000000];

	multimap mp;
	multimap::iterator it; //  イテレータを用意
	pairp;

		trk[i].x = x;
		trk[i].y = y;
		trk[i].MortonNumber = Get2DMortonNumber((int)(x / 1000.), (int)(y / 1000.));
		p.first = trk[i].MortonNumber;
		p.second = trk[i];
		mp.insert(p);// [trk[i].MortonNumber] = trk[i];


	int count = (int)mp.count(mnsel);
	printf("%d\n", count);
	it = mp.find(mnsel);
	for (int i = 0; i < count; i++)
	{
		cout <first << " : "<second.x<<" , "<second.y<<endl;
		it++;
	}