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Cod sursa(job #715252)
#include <fstream>
using namespace std;
int v[50001],sum[50001];
int main()
{
ifstream f("secv2.in");
ofstream g("secv2.out");
int i,N,K,sc=0,poz1,poz2,ne,smax;
f>>N>>K;
for(i=1;i<=N;i++)
{
f>>v[i];
sum[i]=sum[i-1]+v[i];
}
ne=1;
smax=sc=sum[K];
ne=poz1=1;
poz2=K;
for(i=K+1;i<=N;i++)
{
if(sc+v[i]>=sum[i]-sum[i-K]) sc+=v[i];
else
{
ne=i-K+1;
sc=sum[i]-sum[i-K];
}
if(sc>smax)
{
smax=sc;
poz1=ne;
poz2=i;
}
}
g<<poz1<<" "<<poz2<<" "<<smax<<"\n";
}