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Cod sursa(job #712884)
#include<fstream>
#include<deque>
#define dim 500002
using namespace std;
ifstream f("secventa.in");
ofstream g("secventa.out");
int n,k,i,v[dim],baza,fin,st;
deque<int>q;
int main (){
f>>n>>k;
for(i=1;i<=n;i++)
f>>v[i];
q.push_back(i);
for(i=2;i<k;++i){
while(!q.empty() && v[i]<=v[q.back()])
q.pop_back();
q.push_back(i);
}
baza=-dim;
for(i=1;i<=n;++i){
while(!q.empty() && v[i]<=v[q.back()])
q.pop_back();
q.push_back(i);
while(q.front()==i-k)
q.pop_front();
if(i >= k) {
st=v[q.front()];
if(st>baza) {
baza=st;
fin=i;
}
}
}
g<<fin-k+1<<" "<<fin<<" "<<baza<<"\n";
return 0;
}