A. Lighthouse
M ranges minimal apparent volume repellent.
The total number of schemes, minus any program by a limited, adding back the number of programs subject to two limitations.
Limit the number of programs you can get all of the subject.
Some boundary points to the selected points in the same block in a link.
Program number is actually circular arrangement of these blocks Unicom, multiplied by $ 2 ^ {Unicom block is not the number of 1 $},
Because each counter clockwise Unicom block exists in two forms.
Finally, in addition to the unified counter clockwise 2 eliminated overall impact.
B. Miner
Obviously Euler Road.