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Cod sursa(job #690185)
#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
long long n,i,maxim,j,mmaxim=0,pmax;
long long v[200005],prec[200005],s[200005],afis[200005];
int main()
{
f>>n;
for(i=1;i<=n;i++) f>>v[i];
prec[1]=0;
s[1]=1;
i=2;
while(i<=n)
{
maxim=0;
for(j=i-1;j>=1;j--)
if(v[i]>v[j] && (!maxim || s[maxim]<s[j]))
maxim=j;
if(!maxim) s[i]=1,prec[i]=0;
else s[i]=s[maxim]+1,prec[i]=maxim;
if(s[mmaxim]<s[i]) mmaxim = i;
i++;
}
g<<s[mmaxim]<<'\n';
i=2;
afis[1]=v[mmaxim];
while(prec[mmaxim]) afis[i++]=v[prec[mmaxim]], mmaxim=prec[mmaxim];
for(j=i-1;j>=1;j--) g<<afis[j]<<' ';
f.close();
g.close();
return 0;
}