Cod sursa(job #612206)

Utilizator scipianusFMI Ciprian Olariu scipianus Data 6 septembrie 2011 14:54:51
Problema Buline Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.98 kb
#include<fstream>
#include<deque>
using namespace std;
int n,a[200010],sum[400010];
int summax,incmax,lmax;
deque <int> D;

void Citire()
{
	int i,x,c;
	ifstream fin("buline.in");
	fin>>n;
	for(i=1;i<=n;i++)
	{
		fin>>x>>c;
		if(c==0)
			a[i]=a[i+n]=-x;
		else
			a[i]=a[i+n]=x;
		sum[i]=sum[i-1]+a[i];
	}
	for(i=1;i<=n;i++)
		sum[i+n]=sum[i+n-1]+a[i];
	fin.close();
}

void Rezolvare()
{
	int n1=n+n,i;
	for(i=1;i<=n1;i++)
	{
		//deque-ul este ordonat : sum[D.front()]<...<sum[D.back()]
		if(!D.empty() && i-D.front()>=n)
			D.pop_front();
		while(!D.empty() && sum[D.back()]>sum[i]) //scot tot ce este mai mare
			D.pop_back();
		D.push_back(i);
		if(summax<sum[i]-sum[D.front()])
		{
			summax=sum[i]-sum[D.front()];
			incmax=D.front()+1;
			lmax=i-incmax+1;
		}
	}
}

void Afisare()
{
	ofstream fout("buline.out");
	fout<<summax<<' '<<incmax<<' '<<lmax<<"\n";
	fout.close();
}

int main()
{
	Citire();
	Rezolvare();
	Afisare();
	return 0;
}