Hotel Bookings Possible
bool Solution::hotel(vector<int> &arrive, vector<int> &depart, int K) {
vector<pair<int,int>>A;
int size=arrive.size();
for(int i=0;i<size;i++)
{
A.push_back(make_pair(arrive[i],2));
A.push_back(make_pair(depart[i],1));
}
sort(A.begin(),A.end());
int curroom=0;
int roommax=0;
for(int i=0;i<2*size;i++)
{
if(A[i].second==2)
{
curroom++;
roommax=max(curroom,roommax);
}
else{
curroom--;
}
}
return K>=roommax;
}