短語(yǔ)詞組短語(yǔ)plane circular permutation 平面環(huán)排列problem of circular permutation 圓排列問(wèn)題space circular permutation 空間環(huán)排列circular permutation code 循環(huán)排列碼circular permutation with one direction 單繞向圓排列circular permutation with two directions 雙繞向圓排列 返回 circular permutation