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Cod sursa(job #612206)
#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;
}