Mutable Counter in Const

#include <iostream>
using namespace std;

class AccessTracker {
public:
    AccessTracker() : count(0) {}

    // const function allowed to update internal bookkeeping
    void logAccess() const {
        count++;
    }

    int getCount() const {
        return count;
    }

private:
    mutable int count;  // allows modification inside const functions
};

int main() {
    int n;
    cin >> n;

    const AccessTracker tracker;

    for (int i = 0; i < n; i++) {
        tracker.logAccess();
    }

    cout << tracker.getCount();
    return 0;
}