#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int, int>;
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("Ofast")
constexpr ll INF = 1e18;
constexpr int inf = 1e9;
constexpr double INFD = 1e100;
constexpr ll mod = 1000000007;
constexpr ll mod2 = 998244353;
const double PI = 3.1415926535897932384626433832795028841971;
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};
template <class T>
inline bool chmax(T& a, T b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T>
inline bool chmin(T& a, T b) {
  if (a > b) {
    a = b;
    return 1;
  }
  return 0;
}
int main() {
  int N;
  cin >> N;
  vector<int> A(N);
  for (int i = 0; i < (N); i++) {
    cin >> A[i];
  }
  vector<int> ans;
  for (int i = 1; i < N; i++) {
    if (A[i] == 1) {
      ans.push_back(A[i - 1]);
    }
  }
  ans.push_back(A[N - 1]);
  cout << ans.size() << '\n';
  ;
  for (int i = 0; i < ans.size(); i++) {
    cout << ans[i] << (i != ans.size() - 1 ? " " : "\n");
  }
  return 0;
}
