Description
Input
Output
Sample Input
输入一5 5
1 6
3 2
9 2
7 3
7 8
4 9
3
5 4
1 3
1 2
1 2 0
2 5 0
1 5 1
1 3 1
3 4 1
输入二
6 14
2 7
3 10
8 9
3 4
6 5
3 10
6 7
4
6 2
1 2
5 2
3 6
5 2 0
4 5 1
2 3 1
5 4 0
1 2 1
1 4 0
6 4 1
5 4 1
4 6 0
1 5 0
4 1 0
6 4 0
5 5 0
1 2 0
Sample Output
输出12
2
-1
输出2
2
1
1
-1
