#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

int main() {
  int n;
  cin >> n;
  vector<int> a(n), pre(n, -1);
  rep(i, n) {
    cin >> a[i];
    a[i]--;
    if (i > 0) pre[a[i]] = a[i-1];
  }
  vector<bool> used(n, true);
  int ans = 0;
  rep(i, n) {
    if (used[i]) {
      ans++;
      used[i] = false;
      if (pre[i] != -1) used[pre[i]] = false;
    }
  }
  cout << ans << endl;

}