제출 #181663

5 5
1 1
2 5 3
1 3
1 1
4 4 1 5 3

0

2
4
1
5
3

participant says impossible but solution exists

8 6
1 2
1 3
1 2
4 6 1 4 3
3 8 7 4
4 8 7 2 4

0

5
6
8
1
7
2
4
3

participant says impossible but solution exists