Interval by mazhar vai

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb push_back
#define pii pair<int,int>
#define ff first
#define ss second
#define mx 100005
#define endl "\n"
const ll mod=1e9+7;

vector<int>mp[550];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);

    ll n,m,q;
    cin>>n>>m>>q;
    while(m--)
    {
        ll l,r;
        cin>>l>>r;
        for(int i=1; i<=l; i++)
            mp[i].pb(r);
    }

    for(int i=1; i<=500; i++)
    {
        if(mp[i].size())
            sort(mp[i].begin(),mp[i].end());
    }

    while(q--)
    {
        ll l,r;
        cin>>l>>r;

        /// r ta l er kotho no. position o ase
        ll pos=upper_bound(mp[l].begin(),mp[l].end(),r)-mp[l].begin();
        cout<<pos<<endl;
    }


    return 0;
}

// https://www.hackerrank.com/contests/competencia-de-gente-perezosa-round-0-match-0-group-a/challenges/blacknerd-and-his-queries