Please note that in this file
* the network is represented as a directed graph.
* this network is an explicit decomposed network after graph decomposition.
* each node in the network has an ID number.
* ignore all isolated nodes (i.e. those without any link coming in and going out). The isolated nodes are previous merging nodes. They are decomposed after graph decomposition.    
* each number below represents a certain node in the network.
* each link is represented by a node pair (X,Y), where the direction is from node X to node Y.
* each link is associated three bandwidth attributes: the occupied bandwidth (B_occu), the maximum bandwidth (B_max = 100 Mbps), and the bandwidth for supporting NCM (B_s_T = 40 Mbps)

The following shows the multicast scenario:

Network size:
54

Source:
12

Receivers:
4, 5, 9, 17, 19

Expected Data Rate:
3

Links and their attributes:

     X     Y    B_occu

     2    17    36
     2    19    14
     2    29    32
     6     4     7
     6    19    32
    10    17    50
    10    20     1
    10    34    37
    12    10    46
    12    16    24
    12    22    43
    15     9    25
    15    17    40
    16    35    32
    16    39    41
    16    52    19
    18    27    10
    18    44     2
    20    30    46
    20    53     3
    21    23    23
    21    24    47
    21    25    15
    22    23     2
    22    24    14
    22    25    15
    23     5    35
    24    42    25
    25    18    27
    26    28    14
    27    28    38
    28     4     9
    29    31    24
    29    32    34
    29    33    50
    30    31     3
    30    32     2
    30    33     8
    31     4    11
    32     5    47
    33     9    40
    34    36    20
    34    37    41
    35    36    44
    35    37    27
    36    21    46
    37    43    15
    38    40    22
    38    41    43
    39    40    22
    39    41     5
    40    26    18
    41    19    37
    42    45    46
    42    46    40
    42    47    20
    42    48     7
    42    49    14
    42    50    45
    43    45    33
    43    46     4
    43    47    38
    43    48    11
    43    49    49
    43    50    48
    44    45    29
    44    46    12
    44    47    16
    44    48    33
    44    49    35
    44    50    12
    45    38    34
    46     2    21
    47     5    42
    48     6    39
    49     9    31
    50    51    20
    51    54    50
    52    54    14
    53    54    50
    54    15    12