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Cod sursa(job #950545)
#include <fstream>
#include <algorithm>
using namespace std;
ifstream f("secv2.in");
ofstream g("secv2.out");
long long bestsum=-1000000000000000, x;
long start, final, s, n, aux=1, k, nr=0, sum[50005];
int main()
{
f>>n>>k;
for (int i=1; i<=n; i++)
{
f>>x; sum[i]=sum[i-1]+x;
}
for (int i=1, s=0; i<=n; i++)
{
if (sum[i]<s) s=sum[i], start=i;
if (sum[i]-s>bestsum && i-start>k)
{
bestsum=sum[i]-s; final=i;
}
}
if (n==k) g<<1<<' '<<n<<' '<<sum[n]<<'\n';
else g<<start+1<<' '<<final<<' '<<bestsum<<'\n';
f.close(); g.close();
return 0;
}