#include <bits/stdc++.h>

using namespace std;

const int N = 1e6 + 5;
int maxx[N];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    cerr.tie(nullptr);
    int n;
    cin >> n;
    vector<pair<int, int>> v(n);
    for (auto& e : v) {
        cin >> e.first >> e.second;
    }
    sort(v.begin(), v.end());

    maxx[n-2] = v[n-1].second;

    for (int i = n-2; i>=1; i--) {
        maxx[i-1] = max(maxx[i], v[i].second);
    }

    int sol = 1;

    for (int i = 0; i<n-1; i++) {
        if (v[i].second > maxx[i]) {
            sol++;
        }
    }

    cout << sol << endl;
    return 0;
}