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Cod sursa(job #886687)
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[100001],best[100001],poz[100001],i,k,aux,n,v[100001],p;
int main()
{
fin>>n;
for(i=1;i<=n;i++)
fin>>a[i];
for(i=1;i<=n;i++)
{
if(a[i]<best[k])
{
aux=k;
while(a[i]<best[aux])
aux--;
aux++;
best[aux]=a[i];
poz[i]=aux;
}
else
{
best[++k]=a[i];
poz[i]=k;
}
}
fout<<k<<'\n';
for(i=n;i>0;i--)
{
if(poz[i]==k)
{
v[++p]=a[i];
k--;
}
}
for(i=p;i>0;i--)
fout<<v[i]<<' ';
fout.close();
return 0;
}