#include <iostream>
#include <fstream>

using namespace std;

ifstream in("scmax.in");
ofstream out("scmax.out");

int main()
{
    int n, s=1, x, y, i=0;
    long long v[100005];
    in>>n>>x;
    while(in>>y)
    {
        if(y>x)
        {
            v[i]=x;
            i++;
            v[i]=y;
            s++;
        }
        x=y;
    }
    n=i;
    out<<s<<'\n';
    for(i=0;i<=n;i++)
        out<<v[i]<<' ';
    return 0;
}