[UVA][數學] 11051 - Dihedral groups
2006/2007 ACM International Collegiate Programming Contest
University of Ulm Local Contest
Dihedral groups
Consider n points on a unit circle with numbers
k = 0, 1, …, n-1.
Initially point k makes an angle of
360 · k / n
degrees to the
x-axis,
measured in co...
