Cod sursa(job #987252)

Utilizator scipianusFMI Ciprian Olariu scipianus Data 20 august 2013 12:25:21
Problema Garaj Scor 50
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.01 kb
#include<fstream>
#include<algorithm>
using namespace std;
int n,m,C[100100],T[100100],ord[100100];
long long solC,solT,nr[100100];

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

inline void CautareBinara()
{
	long long st,dr,mij;
	st=0LL;
	dr=solT=2000LL*m;
	while(st<=dr)
	{
		mij=(st+dr)/2LL;
		if(Posibil(mij))
		{
			solT=mij;
			dr=mij-1LL;
		}
		else
			st=mij+1LL;
	}
}

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