#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;
    for (int i = 0; i < q; i++){
        ll x, f, x1 = 1, p1, y;
        cin >> x >> f; 
        if (!(x%p) && f == 0){
            cout << m << endl;
            return 0;
        } else if (!(x%p)){
            cout << 0 << endl;
            return 0;
        }
        p1 = p - 2;
        while (p1){
            if (p1 & 1) x1 *= x;
            x *= x;
            x %= p;
            p1 >>= 1;
        }
        y = x1 * f % p;
        if (!y) cout << m/p << endl;
        else cout << (m - y + p)/p << endl;
    }
}