#21646: 如果你想要一直減...................
n-=12差不多壓底線啦，稍微嘗試了一下
if (n == -12 || n == -9 || n == -6 || n == -3)
cout << "YES" << '\n';
n -= 12;
ZeroJudge Forum
n-=12差不多壓底線啦，稍微嘗試了一下
if (n == -12 || n == -9 || n == -6 || n == -3)
cout << "YES" << '\n';
n -= 12;