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Cod sursa(job #812925)
//secventa
#include <fstream>
using namespace std;
int n, k, v[5000001], dq[5000001], p=1, u=0;
int main()
{ int max,pos;
ifstream f("secventa.in");
ofstream g("secventa.out");
int i;
f>>n>>k;
max=-30000;
pos=0;
for(i=1;i<=n;++i)
f>>v[i];
for(i=1;i<=n;++i)
{
while(p<=u&&v[i]<=v[dq[u]])
--u;
dq[++u]=i;
if(dq[p]<=i-k)
++p;
if ((i>=k)&&(max<v[dq[p]])) {max=v[dq[p]];
pos=i; }
}
g<<pos-k+1<<" "<<pos<<" "<<max;
return 0;
}