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Cod sursa(job #812491)
#include <fstream>
#include <utility>
#include <queue>
using namespace std;
ifstream in("secventa.in");
ofstream out("secventa.out");
deque<pair<int,int> > q;
int n,k,a[500010],i,li,ls,m;
int main() {
in>>n>>k;
m = -(1<<29);
for(i=1; i<=n; i++) {
in>>a[i];
while(!q.empty() && q.back().first >= a[i]) {
q.pop_back();
}
q.push_back(make_pair(a[i], i));
while(q.front().second <= i-k) {
q.pop_front();
}
if(i >= k && m < q.front().first) {
m = q.front().first;
li = i-k+1;
while(li > 1 && a[li-1] >= m)
li--;
ls = i;
}
}
out<<li<<' '<<ls<<' '<<m;
return 0;
}