algorithm dfs Input: digraph G begin stack S; array color [n], pred [n], seen [n], done[n] for u in V(G) do color[u] <- WHITE; pred [u] <- NULL
algorithm dfs Input: digraph G begin stack S; array color [n], pred [n], seen [n], done[n] for u in V(G) do color[u] <- WHITE; pred [u] <- NULL
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
Please implement pseudocode in python
![algorithm dfs
Input: digraph G
begin
stack S; array color[n], pred [n], seen [n], done[n]
for u in V(G) do
color[u] <- WHITE; pred [u] <- NULL
end for
time <- 0
for s in V(G) do
if color [s]
== WHITE then
end if
dfsvisit(s)
end for
return pred, seen, done
end](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F92cb700b-4fd1-4d70-aed0-af4fe3c242c8%2F7a386640-74ab-48c8-aeaf-1d1675363cd9%2F5f23bkf_processed.png&w=3840&q=75)
Transcribed Image Text:algorithm dfs
Input: digraph G
begin
stack S; array color[n], pred [n], seen [n], done[n]
for u in V(G) do
color[u] <- WHITE; pred [u] <- NULL
end for
time <- 0
for s in V(G) do
if color [s]
== WHITE then
end if
dfsvisit(s)
end for
return pred, seen, done
end
![algorithm dfsvisit
Input: node s
begin
color [s] <- GREY; seen [s] <- time++; S.push_top(s)
while not S.isempty() do
u <- S.get_top()
if there is a v adjacent to u and color [v] = WHITE then
color [v] <- GREY; pred [v] <- u
seen [v] <- time++; S.push_top(s)
else
S.del_top(); color[u] <- BLACK; done [u] <- time++;
end if
end while
end](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F92cb700b-4fd1-4d70-aed0-af4fe3c242c8%2F7a386640-74ab-48c8-aeaf-1d1675363cd9%2Fsrnil7_processed.png&w=3840&q=75)
Transcribed Image Text:algorithm dfsvisit
Input: node s
begin
color [s] <- GREY; seen [s] <- time++; S.push_top(s)
while not S.isempty() do
u <- S.get_top()
if there is a v adjacent to u and color [v] = WHITE then
color [v] <- GREY; pred [v] <- u
seen [v] <- time++; S.push_top(s)
else
S.del_top(); color[u] <- BLACK; done [u] <- time++;
end if
end while
end
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