#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int a[n];
  for (int i = 0; i < n; i++) cin >> a[i];
  int t = 0;
  for (int i = 0; i < n; i++) {
    if (a[i] == 1) t++;
  }
  cout << t << endl;
  if (n == 1) {
    cout << 1;
  } else {
    for (int i = 1; i < n; i++) {
      if (a[i] == 1) cout << a[i - 1] << " ";
    }
    cout << a[n - 1];
  }
  return 0;
}
