Cod sursa(job #870754)

Utilizator loginLogin Iustin Anca login Data 3 februarie 2013 21:28:03
Problema Zoo Scor 20
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.67 kb
# include <fstream>
# include <iostream>
# include <vector>
# include <algorithm>
# define DIM 100003
# define MAX 120000
# define pb push_back
# define mp make_pair
# define fs first
# define sc second
using namespace std;
int n, m, x[3*DIM], y[3*DIM], s[DIM], a[MAX], N;
vector< pair<int, int> >X, Y;
vector< pair<pair<int,int>, int> > P;

void read ()
{
	ifstream fin ("zoo.in");
	fin>>n;
	int x, y;
	for(int i=1;i<=n;++i)
	{
		fin>>x>>y;
		X.pb(mp(x, i));
		Y.pb(mp(y, i));
	}
	fin>>m;
	for(int i=1;i<=2*m;++i)
	{
		fin>>x>>y;
		X.pb(mp(x, n+i));
		Y.pb(mp(y, n+i));
	}
}

void uniform()
{
	sort(X.begin(),X.end());
	sort(Y.begin(),Y.end());
	
	N=0;
	for(int i=0;i<X.size();++i)
	{
		if (i==0 || X[i-1].fs!=X[i].fs)
			++N;
		x[X[i].sc] = N;
	}
	
	N=0;
	for(int i=0;i<Y.size();++i)
	{
		if (i==0 || Y[i-1].fs!=Y[i].fs)
			++N;
		y[Y[i].sc] = N;
	}
}

void upd (int p)
{
	while(p<=N)
	{
		++a[p];
		p+=p^(p&(p-1));
	}
}

int query (int p)
{
	int r = 0;
	while(p>0)
	{
		r+=a[p];
		p-=p^(p&(p-1));
	}
	return r;
}

void solve ()
{
	for(int i=1;i<=n;++i)
		P.pb(mp(mp(x[i],y[i]), i));
	for(int i=1;i<=m;++i)
	{
		int j = n+2*i-1;
		P.pb(mp(mp(x[j]-1,y[j]-1), n+1+4*i-4));
		P.pb(mp(mp(x[j+1], y[j+1]), n+1+4*i-2));
		P.pb(mp(mp(x[j]-1, y[j+1]), n+1+4*i-3));
		P.pb(mp(mp(x[j+1], y[j]-1), n+1+4*i));
	}
	
	sort(P.begin(),P.end());
	
	for(vector< pair< pair<int,int>, int> >::iterator I=P.begin();I!=P.end();++I)
	{
		if (I->sc <= n)
			upd(I->fs.sc);
		else
		{
			int q = (I->sc - n-1)/4+1, o = (I->sc - n-1)%2;
			s[q] += (o?-1:1)*query(I->fs.sc);
		}
	}
	
}

int main ()
{
	read ();
	uniform ();
	solve ();
	
	freopen("zoo.out", "w", stdout);
	for(int i=1;i<=m;++i)
		printf("%d\n", s[i]);
		
	return 0;
}