#include <iostream>
#include <vector>

using namespace std;

vector<int> segmTree(800008, 0);
vector<int> tomb(200001, 0);

void constructTree(int node, int left, int right)
{
    if(left > right){
        return;
    }
    if(left == right){
        segmTree[node] = tomb[left];
        return;
    }
    int mid = (left + right)/2;
    constructTree(2*node, left, mid);
    constructTree(2*node+1, mid+1, right);

    segmTree[node] = max(segmTree[2*node], segmTree[2*node+1]);
}

int query(int node, int left, int right, int a, int b)
{
    if(left > right){
        return 0;
    }
    if(right < a || left > b){
        return 0;
    }
    if(left >= a && right <= b){
        return segmTree[node];
    }
    int maxleft = 0, maxright = 0;
    int mid = (left + right)/2;

    if(a <= mid){
        maxleft = query(2*node, left, mid, a, b);
    }
    if(mid < b){
        maxright = query(2*node+1, mid+1, right, a, b);
    }
    return max(maxleft, maxright);
}

int main()
{
    int M, N, Q;
    cin >> M >> N >> Q;

    for(int i = 0; i < N; i++){
        int a, b;
        cin >> a >> b;
        tomb[a]++;
        tomb[b+1]--;
    }
    for(int i = 2; i <= 200000; i++){
        tomb[i] = tomb[i-1] + tomb[i];
    }
    constructTree(1, 1, M);

    for(int i = 0; i < Q; i++){
        int a, b;
        cin >> a >> b;
        cout << query(1, 1, M, a, b) << endl;
    }

    return 0;
}