??????????????
????6????ò??????巋λ??
????Right?????????????
????B????????е?????????????????
????I???????·????????
????C????????????ν????????????
????E??????????????????????????
????P????????????????
???????????????
cout<<"???????????????";
cin>>j;
while(j<=0)
{
cout<<"?????????0????"<<endl;//
cin>>j;
}//??????????????
for(int i=0;i<j;i++)
{
}//????????????????????
?????????????????
????1????????????????8?????

????2???????????????-1????0????????1??