 		g0[1, 2] = 1
 		g0[2, 1] = -3
 		
-		XCTAssert(g0.kruskal() == nil)
 		
 		var g1 = G()
 		

		// g2[3, 5] = 1
		
		// print(g2)
		XCTAssert(g2.hierholzer() == nil)
		
		var g3 = G()
		

		// print(g0)
		// print(g0.eulerian)
		// print(g0.semiEulerian)
		
		var g1 = G()
		
