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CF
1735D1700· expert4s256 MB⌨ stdin/stdout
#brute force#combinatorics#data structures#hashing#math

Examples

Sample 1of 4
Input
8 4
0 0 0 0
0 0 0 1
0 0 0 2
0 0 1 0
0 0 2 0
0 1 0 0
1 0 0 0
2 2 0 0
Output
1
Sample 2of 4
Input
7 4
0 0 0 0
0 0 0 1
0 0 0 2
0 0 1 0
0 0 2 0
0 1 0 0
0 2 0 0
Output
3
Sample 3of 4
Input
9 2
0 0
0 1
0 2
1 0
1 1
1 2
2 0
2 1
2 2
Output
54
Sample 4of 4
Input
20 4
0 2 0 0
0 2 2 2
0 2 2 1
0 2 0 1
1 2 2 0
1 2 1 0
1 2 2 1
1 2 0 1
1 1 2 2
1 1 0 2
1 1 2 1
1 1 1 1
2 1 2 0
2 1 1 2
2 1 2 1
2 1 1 1
0 1 1 2
0 0 1 0
2 2 0 0
2 0 0 2
Output
0
1735D.cpp
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Ln 11·137 BGNU C++20 (64)