#2666. P3279 - [CF466E]Information Graph - JOYSKID

P3279 - [CF466E]Information Graph - JOYSKID

4 9

1 4 3

2 4

3 3 1

1 2 3

2 2

3 1 2

1 3 1

2 2

3 1 3
YES

NO

YES