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뺄셈: 3 - 16-7

6	7	1
		1
6	7	0

4	1	7
		5
4	1	2

6	0	1
		1
6	0	0

1	1	4
		7
1	0	7

2	3	7
		6
2	3	1

2	1	5
		7
2	0	8

2	1	1
		2
2	0	9

1	2	5
		7
1	1	8

5	2	6
		3
5	2	3

1	2	7
		2
1	2	5

7	6	4
		4
7	6	0

4	4	8
		5
4	4	3

4	5	1
		1
4	5	0

2	1	5
		7
2	0	8

8	4	1
		5
8	3	6