https://vjudge.net/problem/UVALive-3661
Figure tm too hard to build, and did not write
The idea is to point to the side, the lower left to the upper right shortest run
https://vjudge.net/problem/UVALive-3661
Figure tm too hard to build, and did not write
The idea is to point to the side, the lower left to the upper right shortest run