#include<stdio.h>
long int k,in,a[100],max,b[100],c[100],i,j,n;
FILE *f,*g;
int stabmax()
{
long int st,I,mx;
mx=0;
for (I=1;I<=n;I++) if (b[I]>mx) {mx=b[I];st=I;}
max=mx;
return st;
}
int main()
{
f=fopen("scmax.in","r");
g=fopen("scmax.out","w");
fscanf(f,"%ld",&n);
for (i=1;i<=n;i++) fscanf(f,"%ld",&a[i]);
max=0;
b[n]=1;
for (i=n-1;i>=1;i--)
{
max=0;
for (j=i;j<=n;j++) if ((a[i]<a[j]) && (b[j]>max)) max=b[j]; 
b[i]=max+1;
}

in=stabmax();
k=0;


for (i=in;i<=n;i++)
{

if (b[i]==max) 
{k++;
c[k]=a[i];
max--;
if (max==0) break;
}


}
fprintf(g,"%ld",k);
fprintf(g,"\n");
for (i=1;i<=k;i++) fprintf(g,"%ld ",c[i]);

return 0;
}