You should be able to match all of them in all test cases

4
1 2
1 3
1 4
2 3

10
3 5
1 6
9 10
8 4
2 7
8 9
2 8
8 9
2 7
2 3
3 9
3 10
1 5
4 8
7 10
2 8
1 2
1 3
9 10
4 6
3 10
1 4
1 3


My program fails for this test, I get 18. Using just first 5 you can
match all guards.

20
11 1
9 3
14 20
17 10
15 6
5 16
18 13
8 7
12 4
2 19
9 12
12 14
4 16
11 13
8 15
13 17
2 20
15 20
3 17
5 14
3 10
8 13
3 17
10 13
5 20
4 15
10 19
2 14
7 9
12 14
5 9
3 9
10 16
3 19
17 18
3 11
8 18
8 14
7 16
1 16
2 9
13 19
7 11
6 7
2 10
5 18
13 16
3 5
8 11
16 20
12 16
3 19
3 6
2 15
11 14
1 5
6 12
4 12
6 13
13 15
4 6
8 15
6 12
4 18
6 19
4 8
6 11
11 12
3 11
7 11
9 20
6 7
6 7
10 17
13 15
13 17
8 17
5 8
17 18
9 11
12 18
4 20
9 20
6 7
1 19
2 16
13 15
7 12
8 12
6 14
9 13
18 20
9 18
8 19
13 18
7 8
15 19
4 8
15 20
7 20
9 10
1 6
10 20
5 8
16 18
7 12
4 8
1 4
9 19
5 12
10 20
6 17
5 10
9 10
16 20
12 19
4 14
10 20
12 17
5 19
4 7
4 6
2 19
4 11
4 6
1 11
10 17
6 8
5 10
9 11
7 9
6 11
5 9
1 7
13 19
16 20
5 10
6 8
1 13
1 16
15 18
2 12
2 7
15 19
8 20
6 13
14 16
9 16
2 9
10 16
1 18
7 9
17 18
18 19
1 9
7 13
8 11
2 9
8 18
12 16
18 19
3 10
7 11
9 12
1 8
4 19
1 12
2 18
6 15
2 9
2 4
8 10
8 12
4 17
5 14
6 19
11 13
17 20
3 16
2 16
6 20
8 13
3 20
9 18
5 6
6 7
4 19
7 18
13 15
6 8
1 15
9 11
16 17
11 20
7 14
15 19
4 10
4 12
1 9
13 15
4 16
1 9
1 19
2 3
3 12
8 14
3 16
6 10
3 13
6 19
9 19
12 13
10 18
5 19
9 12
11 19
4 19
9 16
17 19
8 17
4 10
6 8
12 20
9 13
6 20
9 11
7 11
15 20
7 19
12 20
16 20
6 13
1 16
4 6
12 16
10 12
9 20
7 20
9 13
5 9
8 16
15 19
8 15
8 19
4 15
12 20
10 13
5 7
7 13
11 15
8 11
7 11
4 16
3 20
14 19
2 15
10 16
4 15
9 19
1 19
1 5
1 20
1 8
4 6
10 12
16 19
3 8
6 17
4 19
12 20
7 9
2 5
13 19
11 15
9 14
2 10
9 19
12 16
5 11
8 17
10 19
4 9
4 18
2 10
12 16
6 19
6 8
15 19
5 15
4 18
6 10
8 19
12 13
13 17
5 20
8 16
4 8
10 13
8 9
3 11
11 12
10 20
14 15
1 15
1 5
2 12
7 9
9 20
16 19
5 11
12 18
4 14
8 17
6 9
16 19
13 18
13 14
3 12
5 9
9 16
15 16
8 16
4 12
15 19
17 19
9 11
13 20
11 19
3 6
7 18
2 13
9 15
7 12
2 11
12 18
9 17
1 15
5 8
1 17
8 19
1 13
6 20
7 20
1 8
3 14
12 15
2 14
1 14
16 19
2 6
8 12
6 10
10 18
8 15
16 19
3 9
6 20
1 19
11 19
13 19

How did you get these data?