#include <stdio.h>
#define DIM 100001

FILE *f1 = fopen("scmax.in","r");
FILE *f2 = fopen("scmax.out","w");

int a[DIM];
int t[DIM];
int opt[DIM];

int n; 
int i,j,x;
int max;

void func(int x){
	if(x > 0){
		func(t[x]);
		fprintf(f2,"%d ",a[x]);
	}	
}

int main(){
	
	fscanf(f1,"%d\n",&n);
	for(i=1; i<=n; i++){
		fscanf(f1,"%d ",&a[i]);
		
		max = 0;
		for(j=1; j<i; j++)
			if(a[i] > a[j])
				if(max < opt[j]){
					max = opt[j];
					t[i] = j;
					
				}
		
		opt[i] = max + 1;	
		if(opt[i] > opt[x])
			x = i;
	}
	
	fprintf(f2,"%d\n",opt[x]);
	
//	x = n;
//	while(x){
//		fprintf(f2,"%d ",a[x]);
//		x = t[x];		
//	}
	func(x);
	
	fclose(f1);
	fclose(f2);
	
	return 0;
}