sample.gr

c FILE			: sample.gr
c No. of vertices	: 64
c No. of directed edges	: 300
c Max. weight		: 100
c Min. weight		: 0
c A directed arc from u to v of weight w
c is represented below as ' a  u  v  w '
p sp 64 300
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a 1 17 23
a 1 21 0
a 2 58 56
a 2 44 84
a 2 41 93
a 2 37 10
a 2 61 37
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