int id = -1;
		for(int j = hd[u][l]; j != 0; j = rnx[j]) {
			cout << j << ' ' << rid[j] << ' ' << rnx[j] << endl;
			if(l == rc[rid[j]].l && r == rc[rid[j]].r && u == rc[rid[j]].u && d == rc[rid[j]].d) {
				id = rc[rid[j]].id;
				cout << rc[rid[j]].l << ' ' << rc[rid[j]].r << ' ' << rc[rid[j]].u << ' ' << rc[rid[j]].d << ' ' << rc[rid[j]].id << endl; //输出了
				break;
			}
		}
		cout << "d1\n";//没输出

应该没爆栈，那么可能的原因是..?