input:

4446
21 23 21
21 20
19 10
6 11
9 21
18 9
14 1
18 11
14 2
19 15
17 11
6 2
19 17
3 16
1 7
5 11
17 4
10 20
13 16
13 3
13 8
9 11
12 13
12 18
12 3 13 4 10 11 6 1 14 9 15 21 8 19 18 5 16 17 7 20 2
24 28 24
19 15
2 11
20 18
19 17
8 6
3 10
21 18
22 6
21 10
14 6
14 7
5 19
2 23
5 10
1 11
12 20
13 16
24 3
10 9...

output:

0
21
9
6
5
2
15
12
12
18
13
13
4
6
10
12
7
14
15
12
11
0
5
0
11
11
3
0
12
1
17
15
13
11
11
7
13
7
15
12
8
14
4
6
12
11
0
17
18
17
1
0
15
11
6
12
14
18
11
3
2
11
9
12
0
9
16
3
11
15
11
14
12
14
0
15
18
16
9
14
15
12
1
19
11
4
3
0
8
11
13
11
20
16
12
15
19
0
10
11
15
5
14
0
15
4
13
0
8
12
12
0
19
16
1...

result:

wrong answer 1st lines differ - expected: '12', found: '0'