#include <bits/stdc++.h>
#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
#include<string>
using ll = long long;
using namespace std;

int main()
{
    ll n, m, p, q;
    cin >> n >> m >> p >> q;
    vector<ll> yaki(p);
    for (int i = 0; i < q; i++){
        ll x, f, cnt = 0;
        cin >> x >> f; 
        for (int j = 0; j < p; j++){
            if ((x * j)%p == f){
                cnt += (m/p);
                if(m%p >= j) cnt++;
                if (j == 0) cnt--;
            }
        }
        cout << cnt << endl;
    }
}