图1-16是用火柴摆成的猪,想想看,如何移动2根火柴,使它变成四腿张开的猪?
图1-16 R/2uGfCkYjGc6g3v9wGjeK8cPkwaxjR+74Bnyi41lBY/CIFPm8D/Us52QOeV1HXO