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Cod sursa(job #204966)
#include<fstream>
using namespace std;
int a[500009];
int b[500009];
int main(){
int n, k, i, vf, ult,x,pi,psf,bmax;
ifstream f("secventa.in");
f>>n>>k;
vf=0;
ult=-1;
for(i=0;i<k;i++){
f>>x;
if(vf>ult){vf=ult=0;a[ult]=x;b[ult]=i+1;}
else {while(a[ult]>x && ult>=vf) ult--;
if(ult<vf){ ult=vf=0;a[ult]=x;b[ult]=i+1;}
else{ a[++ult]=x;b[ult]=i+1;}
}
}
pi=1;psf=k;bmax=a[vf];
for(i=k+1;i<=n;i++){
if(b[vf]<i-k+1) vf++;
f>>x;
if(vf>ult){ult=vf;a[ult]=x;b[ult]=i;}
else {while(a[ult]>x && ult>=vf) ult--;
if(ult<vf){ ult=vf;a[ult]=x;b[ult]=x;}
else{ a[++ult]=x;b[ult]=x;}
}
if(a[vf]>bmax){bmax=a[vf];psf=i;pi=i-k+1;}
}
f.close();
ofstream g("secventa.out");
g<<pi<<' '<<psf<<' '<<bmax<<'\n';
g.close();
return 0;
}