混凝土粉末（concrete）
You cannot submit for this problem because the contest is ended. You can click "Open in Problem Set" to view this problem in normal mode.
输入样例
5 8
1 1 4 2
2 3 1
2 3 3
1 2 5 1
2 3 3
2 5 2
2 1 2
2 1 3
输出样例
1
0
4
0
1
0
You cannot submit for this problem because the contest is ended. You can click "Open in Problem Set" to view this problem in normal mode.
5 8
1 1 4 2
2 3 1
2 3 3
1 2 5 1
2 3 3
2 5 2
2 1 2
2 1 3
1
0
4
0
1
0
