#940. 混凝土粉末（concrete）
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ID: 940
Type: Default
3000ms
512MiB
Tried: 35
Accepted: 3
Difficulty: 9
Uploaded By:
zhouyou
混凝土粉末（concrete）
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
Statistics
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