Show:
-3
-2
+3
-2
+9
100

3-3

0
100

2-2

0
100

3+3

6

100

3-2

1

100

9+2

11
200

4-3

1

200

4-2

2
200

4+3

7

200

5-2

3

200

9+3

12

300

5-3

2

300

6-2

4
300

3+5

8

300

7-2

5

300

9+5

14
400

6-3

3

400

8-2

6
400

6+3

9
400

9-2

7

400

9+7

16

500

7-3

4

500

10-2

8

500

3+7

10

500

11-2

9

500

9+9

18