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Cod sursa(job #46463)
var a,q:array[1..500000] of longint;
n,k,i,st,dr,rez,poz:longint;
f,g:text;
begin
assign(f,'secventa.in'); reset(f);
assign(g,'secventa.out'); rewrite(g);
read(f,n,k);
for i:=1 to n do
read(f,a[i]);
rez:=-2000000000;
st:=1;
dr:=0;
for i:=1 to k-1 do begin
while(dr>=st) and (a[i]<=a[q[dr]]) do
dr:=dr-1;
dr:=dr+1;
q[dr]:=i;
end;
for i:=k to n do begin
while(dr>=st) and (a[i]<=a[q[dr]]) do
dr:=dr-1;
dr:=dr+1;
q[dr]:=i;
while (st<=dr) and (q[st]<i-k+1) do
inc(st);
if a[q[st]]>rez then begin
rez:=a[q[st]];
poz:=i;
end;
end;
writeln(g,poz-k+1,' ',poz,' ',rez);
close(f); close(g);
end.