Walls

Unrated

English

Language

Statement

Walls: original English statement, page 1

Walls: original English statement, page 2

Sample input 1

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

Sample output 1

2
3