约瑟夫环

def makelist(list):
    leng = len(list)  #集合长度
    if leng >= 3 :
        tempList = copy.deepcopy(list)
        newList = []
        va = int(leng / 3)
        yu = leng % 3
        for i in range(1,va+1):
            tempList.remove(list[i * 3-1])
        for i in range(1, yu+1):  #清除余数
            newList.append(list[va*3+i-1])
            tempList.remove(list[va*3+i-1])
        for value in tempList:
            newList.append(value)
        return makelist(newList)
    else:
        return list

list =[]  #创建list
for i in range(1,51):
    list.append(i)
print(list)

newList = makelist(list)

print(newList)