Matching instance = new Matching();
instance.addEdge(0, 4 + 2, 5.6f);
instance.addEdge(1, 4 + 3, 5.6f);
instance.addEdge(3, 4 + 1, 5.6f);
int[][] result = instance.toBipartiteArrayModY(4);
assertEquals(2, result[0][0]);
assertEquals(3, result[1][0]);
assertEquals(null, result[2]);
assertEquals(1, result[3][0]);
}