洛谷的输入格式确实问题很大，很多题目都有问题，真心希望能改
by wjy666 @ 2017-05-08 15:44:08
你把这个去掉了试一下：freopen("comehome.in","r",stdin); freopen("comehome.out","w",stdout);
by Drinkkk @ 2017-07-25 08:46:06