#include <bits/stdc++.h>   using namespace std;   int main() {     int n, a = 0, l[101], r[101], k;     cin >> n;     for (int i = 0; i < n; i++) {       cin >> l[i] >> r[i];     }     cin >> k;     for (int i = 0; i < n; i++) {       if (k <= r[i]) {         a++;       }     }     cout << a;   }   