4705: P9426 [蓝桥杯 2023 国 B] 抓娃娃

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:0 Solved:0

Description

Input

Output

Sample Input Copy

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

Sample Output Copy

3
2

HINT