case 1:
connected: 1
degree distribution:
node0:4,node1:1,node2:1,node3:1,node4:1,
clustering coefficient:0.000000
the shortest path between 1 and 3: 4
Path: 1->0->3 
diameter:7
radius:4

case 2:
connected: 1
degree distribution:
node0:1,node1:3,node2:2,node3:3,node4:3,node5:1,node6:3,
clustering coefficient:0.238095
the shortest path between 1 and 3: 7
Path: 1->2->3 
diameter:16
radius:9

case 3:
connected: 0
degree distribution:
node0:3,node1:2,node2:2,node3:3,node4:4,node5:2,node6:4,node7:2,node8:1,node9:1,
clustering coefficient:0.600000
