제출 #85737

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

-1

3

5
6
2 3
3 4
5 1
2 4
3 1
1 2

-1

4

7
16
5 4
2 5
2 7
5 7
2 1
1 4
3 4
7 3
4 7
6 4
5 1
1 3
6 2
7 6
3 6
3 2

-1

6

2
1
1 2

런타임 에러 (RTE)
stderr:
 Traceback (most recent call last):
  File "Main.py", line 13, in <module>
    a, b = map(int, input().split())
ValueError: not enough values to unpack (expected 2, got 0)

1

4
1
1 2

런타임 에러 (RTE)
stderr:
 Traceback (most recent call last):
  File "Main.py", line 13, in <module>
    a, b = map(int, input().split())
ValueError: not enough values to unpack (expected 2, got 0)

1

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

런타임 에러 (RTE)
stderr:
 Traceback (most recent call last):
  File "Main.py", line 13, in <module>
    a, b = map(int, input().split())
ValueError: not enough values to unpack (expected 2, got 0)

4