제출 #103753

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

YES
NO
YES

YES
NO
NO

3
7 3
6 1
1 5
2 5
2 1
2 1
9 12
2 4
7 1
6 1
5 1
2 5
3 2
1 4
9 1
1 2
1 3
6 2
8 1

YES
YES
YES

YES
YES
NO

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

YES
YES
YES

YES
NO
YES