Input formats

[Rui Sarmento]

Hi all,

What are the input formats to use for edge lists and adjacency lists in the 
following layout:

For Edge List (undirected):

1  3
3  2
4  8
5  3
.   .
.   .
.   .

and for adjacency lists like:

1   2
2   3
3   1   2   5   
4   8
5   3
.    .
.    .
.    .

and other question, is it requirement to have the network divided in several 
part files in hdfs?

Thanks very much for your help.

Regards