#include<cstdio>

FILE *fin=fopen("scmax.in","r");
FILE *fout=fopen("scmax.out","w");

int a[100001],sln[100001],pz[100001],n,i,max,j,maxim,poz;

int main(){
	
	fscanf(fin,"%d",&n);
	
	for(i=1;i<=n;i++)
		fscanf(fin,"%d",&a[i]);
	
	sln[n]=1;
	pz[n]=-1;
	
	
	for(i=n-1;i>=1;i--){
		pz[i]=-1;
		max=0;
		for(j=i+1;j<=n;j++)
			if(a[i]<a[j] && sln[j]>max){
				max=sln[j];
				pz[i]=j;
			}
		sln[i]=max+1;
		if(sln[i]>maxim){
			maxim=sln[i];
			poz=i;
		}
	}
	
	fprintf(fout,"%d\n",maxim);
	
	/*maxim--;
	for(i=poz+1;i<=n;i++){
		if(sln[i]==maxim){
			fprintf(fout," %d",a[i]);
			maxim--;
		}
	}*/
	
	i=poz;
	while(i!=-1){
		
		fprintf(fout,"%d ",a[i]);
		i=pz[i];
		
	}
	
	return 0;
	
}