//  Collecting Numbers

#include<bits/stdc++.h>

using namespace std;

int main() {
    int n; cin >> n;
    vector<int> in(n);
    for (auto &e: in) cin >> e;
    int count = 1;
    map<int, int> pos;
    for (int i{}; i < n; i++) pos[in[i]] = i;
    for (int i = 1; i < n; i++) {
        if (pos[i] > pos[i+1]) count ++;
    }
    cout << count << endl;
    return 0;
}