[ZOJ][FFT快速傅立葉] 1637 - Fast Image Match
Given two images A and B, use image B to cover image A. Where would we put B on
A, so that the overlapping part of A and B has the most likelihood? To simplify
the problem, we assume that A and B only contain numbers between 0 and 255. The
difference between A and B is defi...
