1. insert 2 merge
Yun-Yan Chi
Dec 21, 2011

2. • insertion sort 2 merge sort
• two level nested condition
• poslen
• transposition!
• for each direction (forward and backward)
• 4 branches
• totally, 8 branches

3. 2
1
0
?

4. 3
2
1
0

5. 2
? 1
0

6. 1’
( ? 0’ )
0

7. 3
1 2
0

8. forward

10. if c1
then if c2
then b1 else b2
else if c2
then b3 else b4

11. if c1
then if c2
then b1 else b2
else if c2
then b3 else b4

12. if c2
then if c1
then b1 else b3
else if c1
then b2 else b4

14. if c1
then if c2
then b1 else b2
else if c2’
then b3 else b4

21. backward

24. generalization!