ACLPC D
https://gyazo.com/3489c88eee857504807bd0eccd477eac
from AtCoder Library Practice Contest
ACLPC_D
D - Maxflow
https://gyazo.com/1580929a4df6de245382b72c60b15874
maximum flow
When squares are painted in a checkerboard pattern, tiles always step on one square of a different color.
That is, a tile is an edge of a two-part graph, and the maximum number of tiles is Maximum two-part matching.
This can be attributed to the maximum flow
https://gyazo.com/3489c88eee857504807bd0eccd477eac
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