#include<stdio.h>
int v2[100001],v[100001];
int main()
{
	int i,n,k;
	freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	scanf("%d",&n);
	for(i=1;i<=n;i++)
		scanf("%d",&v[i]);
	k=1;
	for(i=1;i<=n;i++)
		if(v[i]>v[v2[k-1]]&&(v[i]<v[v2[k]]||v2[k]==0))
			v2[k]=i;
		else
			if(v[i]>v[v2[k]])
				v2[++k]=i;
	printf("%d\n",k);
	for(i=1;i<=k;i++)
		printf("%d ",v[v2[i]]);
	return 0;
}