This week, I had some mistakes. It is really hard to say:

l = abs(**px**\[x\] - bl); r = abs(**px**\[x\] - br);  
t = abs(**py**\[x\] - bt); b = abs(**px****py**\[x\] - bb);

How can I felt smooth while typing these codes? Everyone will punch me!!!

int n, m, a, b, vx[maxn*maxn], vy[maxn*maxn], hx[maxn*maxn], hy[maxn*maxn];

I had made it so small so I only got 10 points.

After I made it larger, it passed!! I am naïve!

bool bitechar() {
char s;
s = getchar();
ifwhile (s != '#' && s != '.') s = getchar();
if (s == '#') return true;
return false;
}

No wonder dph wants to punch me.

So I can do better. :)