Материалы по теме:
Continue reading...
，这一点在同城约会中也有详细论述
类似：从一堆牌中每次挑出最小的放左边
Note however that depending on as well as the distribution of colours in the palette, there may not always be an exact solution for any given . Instead we’ll say that we want to minimise the absolute error between and some linear combination , or .