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Cod sursa(job #560152)
#include<fstream>
#define nmax 50005
using namespace std;
long long v[nmax],s[nmax],sol[nmax];
int n,k,poz1,poz2,poz;
void citire()
{
ifstream fin("secv2.in");
fin>>n>>k;
int i;
for(i=1;i<=n;i++)
fin>>v[i],s[i]=s[i-1]+v[i];
fin.close();
}
void scrie()
{
ofstream fout("secv2.out");
fout<<poz1<<' '<<poz2<<' '<<sol[n];
fout.close();
}
void pd()
{
int i,minim,pozmin;
for(i=1;i<=n;i++)
sol[i]=-25000*50000-2;
minim=s[1];pozmin=1;
sol[k]=s[k];poz1=1;poz2=k;poz=k;
for(i=1;i<k;i++)
sol[i]=s[i];
for(i=k+1;i<=n;i++)
{
if(sol[i-1]<s[i]-minim) sol[i]=s[i]-minim,poz2=i,poz1=pozmin;
else sol[i]=sol[i-1];
if(minim>sol[i-k]) minim=s[i-k],pozmin=i-k+1;
}
}
int main ()
{
citire();
pd();
scrie();
return 0;
}