// }
// }
// long generatingGraphStartTime = System.nanoTime();
GraphGenerator generator = new RandomIntervalGraphGenerator();
Graph graph = (Graph) generator.generate(num);
// long generatingGraphEndTime = System.nanoTime() - generatingGraphStartTime;
// System.out.println("Generation graph time is - " + generatingGraphEndTime);
//
//// Graph graph = new Graph(a);
// System.out.println("The matrix is:");