cf/mirror

DAG

CF
1302B3s256 MB⌨ stdin/stdout
#constructive algorithms

Examples

Sample 1of 3
Input
5 4
1 2
2 3
3 4
4 5
Output
55
Sample 2of 3
Input
12 6
1 2
3 4
5 6
8 7
10 9
12 11
Output
30
Sample 3of 3
Input
7 6
1 2
1 3
2 4
2 5
3 6
3 7
Output
45
1302B.cpp
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Ln 11·137 BGNU C++20 (64)