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Question 2 : Consider the following directed graph: ( 2 . 1 ) Draw the D F S - forest obtained by running algorithm DFS
Question : Consider the following directed graph:
Draw the forest obtained by running algorithm DFS Classify each edge as a tree edge, forward edge, back edge, or cross edge. In the DFSforest, give the pre and postnumber of each vertex. Whenever there is a choice of vertices, pick the one that is alphabetically first.
Draw the forest obtained by running algorithm DFS Classify each edge as a tree edge, forward edge, back edge, or cross edge. In the DFSforest, give the pre and postnumber of each vertex. Whenever there is a choice of vertices, pick the one that is alphabetically last.
Note that in algorithm DFSG starts by calling ExploreA Explore for vertex A
Note that in algorithm DFSG starts by calling ExploreG Explore for vertex
Algorithm DFS :
for each vertex
do visited false
endfor;
clock ;
for each vertex
do if visited false
then ExPLORE
endif
endfor
Algorithm Explore :
visited true;
pre clock;
clock clock ;
for each edge
do if visited false
then EXPLORE
endif
endfor;
post clock;
clock clock
Question : Consider the following directed graph:
Draw the forest obtained by running algorithm DFS Classify each edge as a tree edge, forward edge, back edge, or cross edge. In the DFSforest, give the pre and postnumber of each vertex. Whenever there is a choice of vertices, pick the one that is alphabetically first.
Draw the forest obtained by running algorithm DFS Classify each edge as a tree edge, forward edge, back edge, or cross edge. In the DFSforest, give the pre and postnumber of each vertex. Whenever there is a choice of vertices, pick the one that is alphabetically last.
Note that in algorithm DFSG starts by calling ExploreA Explore for vertex A
Note that in algorithm DFSG starts by calling ExploreG Explore for vertex G
Algorithm :
for each vertex
do visited false
endfor;
clock ;
for each vertex
do if visited false
then ExPLORE
endif
endfor
Algorithm EXPLORE :
visited true;
pre clock;
clock clock ;
for each edge
do if visited false
then ExplorE
endif
endfor;
post clock;
clock clock
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