#include <iostream>
using namespace std;
int main() {
// Find vacancy on the 15th floor of the third building
int guests[3][15][19];
int room;
int vacancy = 0;
for(room = 0; room < 20; room++)
if(guests[2][14][room] == 0)
vacancy++;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IG1haW4oKSB7CgkvLyBGaW5kIHZhY2FuY3kgb24gdGhlIDE1dGggZmxvb3Igb2YgdGhlIHRoaXJkIGJ1aWxkaW5nCglpbnQgZ3Vlc3RzWzNdWzE1XVsxOV07CglpbnQgcm9vbTsKCWludCB2YWNhbmN5ID0gMDsKCglmb3Iocm9vbSA9IDA7IHJvb20gPCAyMDsgcm9vbSsrKQoJCWlmKGd1ZXN0c1syXVsxNF1bcm9vbV0gPT0gMCkKCQl2YWNhbmN5Kys7CglyZXR1cm4gMDsKfQ==