#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 c = 0;
  for (int i = 0; i < n; i++)
    if (a[i] == 1) c++;
  cout << c << endl;
  int m = 0;
  for (int i = 0; i < n; ++i) {
    if (a[i] >= a[i + 1]) {
      cout << a[i] << " ";
      m = 0;
    } else
      m++;
  }
  if (m != 0) cout << m << " ";
}
