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Cod sursa(job #25818)
#include<stdio.h>
long n,sum,lg1[200001],ind2[200001],x[200001],max1[200002],max2[200002],i,a,b,inc,lg,lgmax,incmax,maxon,s1,s2;
int main()
{
freopen ("buline.in","rt",stdin);
freopen ("buline.out","wt",stdout);
scanf("%ld",&n);
for (i=1;i<=n;i++)
{
scanf("%ld %ld",&a,&b);
x[i]=b==0?-a:a;
}
sum=0;
inc=1;
for (i=1;i<=n;i++)
{
if (sum<0)
{
sum=0;
inc=i+1;
lg=0;
}
else
{
sum+=x[i];
lg++;
if (sum>maxon)
{
maxon=sum;
incmax=inc;
lgmax=lg;
}
}
}
for (i=1;i<=n;i++)
{
s1+=x[i];
if (s1>max1[i-1])
{
max1[i]=s1;
lg1[i]=i;
}
else
{
max1[i]=max1[i-1];
lg1[i]=lg1[i-1];
}
}
for (i=n;i>=1;i--)
{
s2+=x[i];
if (s2>max2[i+1])
{
max2[i]=s2;
ind2[i]=i;
}
else
{
max2[i]=max2[i+1];
ind2[i]=ind2[i+1];
}
}
// s2+=x[i],max2[i]=max2[i+1]>s2?max2[i+1]:s2;
for (i=1;i<=n;i++)
if (max1[i]+max2[i+1]>maxon)
{
maxon=max1[i]+max2[i+1];
incmax=ind2[i+1];
lgmax=lg1[i]+n-ind2[i+1]+1;
}
printf("%ld %ld %ld\n",maxon,incmax,lgmax);
return 0;
}