#include <iostream>
#include <fstream>

using namespace std;
int a[200001];

int main()
{
    int m, n, q;
    ifstream f("be.in");
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin >> m >> n >> q;
    for (int i = 1; i <= n; i++) {
        int x, y;
        cin >> x >> y;
        for (int j = x; j <= y; j++) a[j]++;
    }
    //for (int i = 1; i <= m; i++) cout << a[i] << " ";
    //cout << endl;
    for (int t = 1; t <= q; t++) {
        int x, y;
        cin >> x >> y;
        int ma = a[x];
        for (int i = x + 1; i <= y; i++) {
            if (a[i] > ma) ma = a[i];
        }
        cout << ma << endl;
    }
    return 0;
}