1

Breadth First Search

s

2

5

4

7

8

3 6 9

2

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: s

Top of queue

2

1Shortest pathfrom s

3

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: s 2

Top of queue

3

1

1

4

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: s 2 3

Top of queue

5

1

1

1

5

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 2 3 5

Top of queue

1

1

1

6

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 2 3 5

Top of queue

4

1

1

1

2

7

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 2 3 5 4

Top of queue

1

1

1

2

5 already discovered:don't enqueue

8

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 2 3 5 4

Top of queue

1

1

1

2

9

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 3 5 4

Top of queue

1

1

1

2

10

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 3 5 4

Top of queue

1

1

1

2

6

2

11

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 3 5 4 6

Top of queue

1

1

1

2

2

12

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 5 4 6

Top of queue

1

1

1

2

2

13

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 5 4 6

Top of queue

1

1

1

2

2

14

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 4 6

Top of queue

1

1

1

2

2

15

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 4 6

Top of queue

1

1

1

2

2

8

3

16

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 4 6 8

Top of queue

1

1

1

2

2

3

17

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 6 8

Top of queue

1

1

1

2

2

3

7

3

18

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 6 8 7

Top of queue

1

1

1

2

2

3

9

3

3

19

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 6 8 7 9

Top of queue

1

1

1

2

2

3

3

3

20

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 8 7 9

Top of queue

1

1

1

2

2

3

3

3

21

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 7 9

Top of queue

1

1

1

2

2

3

3

3

22

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 7 9

Top of queue

1

1

1

2

2

3

3

3

23

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 7 9

Top of queue

1

1

1

2

2

3

3

3

24

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 7 9

Top of queue

1

1

1

2

2

3

3

3

25

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 9

Top of queue

1

1

1

2

2

3

3

3

26

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 9

Top of queue

1

1

1

2

2

3

3

3

27

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue: 9

Top of queue

1

1

1

2

2

3

3

3

28

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Undiscovered

Discovered

Finished

Queue:

Top of queue

1

1

1

2

2

3

3

3

29

Breadth First Search

s

2

5

4

7

8

3 6 9

0

Level Graph

1

1

1

2

2

3

3

3