Directed Depth First Search
A
Adjacency Lists
B
H
C
I
D
F
E
G
A:
B:
C:
D:
E:
F:
G:
H:
I:
F G
A H
A D
C F
C D G
E:
:
B:
H:
1
Directed Depth First Search
A
B
H
C
G
I
D
F
E
dfs(A)
A-F A-G
Function call stack:
2
Directed Depth First Search
A
B
H
C
G
I
D
F
E
visit(F)
F-E
dfs(A)
A-F A-G
Function call stack:
3
Directed Depth First Search
A
B
H
C
G
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
4
Directed Depth First Search
A
B
H
C
G
dfs(C)
C-A C-D
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
5
Directed Depth First Search
A
B
H
C
G
dfs(C)
C-A C-D
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
6
Directed Depth First Search
A
dfs(D)
B
H
C
G
D-C D-F
dfs(C)
C-A C-D
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
7
Directed Depth First Search
A
dfs(D)
B
H
C
G
D-C D-F
dfs(C)
C-A C-D
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
8
Directed Depth First Search
A
dfs(D)
B
H
C
G
D-C D-F
dfs(C)
C-A C-D
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
9
Directed Depth First Search
A
B
H
C
G
dfs(C)
C-A C-D
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
10
Directed Depth First Search
A
B
H
C
G
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
11
Directed Depth First Search
A
B
H
C
G
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
12
Directed Depth First Search
A
B
H
C
G
dfs(G)
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
13
Directed Depth First Search
A
B
H
C
G
I
D
dfs(E)
E-C E-D E-G
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
14
Directed Depth First Search
A
B
H
C
G
I
D
F
E
dfs(F)
F-E
dfs(A)
A-F A-G
Function call stack:
15
Directed Depth First Search
A
B
H
C
G
I
D
F
E
dfs(A)
A-F A-G
Function call stack:
16
Directed Depth First Search
A
B
H
C
G
I
D
F
E
dfs(A)
A-F A-G
Function call stack:
17
Directed Depth First Search
A
B
H
C
G
I
D
F
E
Nodes reachable from A: A, C, D, E, F, G
18