Cod sursa(job #987254)

Utilizator scipianusFMI Ciprian Olariu scipianus Data 20 august 2013 12:27:41
Problema Garaj Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.95 kb
#include<fstream>
#include<algorithm>
using namespace std;
int n,m,C[100100],T[100100],ord[100100];
int solC,solT,nr[100100];

inline bool Posibil(int t)
{
	int i,aux=m;
	for(i=1;i<=n && aux>0;i++)
		aux-=C[i]*(t/(2*T[i]));
	if(aux>0)
		return false;
	return true;
}

inline void CautareBinara()
{
	int st,dr,mij;
	st=0;
	dr=solT=2000000000;
	while(st<=dr)
	{
		mij=st+(dr-st)/2;
		if(Posibil(mij))
		{
			solT=mij;
			dr=mij-1;
		}
		else
			st=mij+1;
	}
}

inline bool Sortare(int a,int b)
{
	return nr[a]>nr[b];
}

int main()
{
	int i;
	ifstream fin("garaj.in");
	fin>>n>>m;
	for(i=1;i<=n;i++)
	{
		fin>>C[i]>>T[i];
		ord[i]=i;
	}
	fin.close();
	
	CautareBinara();
	for(i=1;i<=n;i++)
		nr[i]=C[i]*(solT/(2*T[i]));
	sort(ord+1,ord+n+1,Sortare);
	int aux=m;
	for(i=1;i<=n && aux>0;i++)
		aux-=nr[ord[i]];
	solC=i-1;
	
	ofstream fout("garaj.out");
	fout<<solT<<' '<<solC<<"\n";
	fout.close();
	return 0;
}