import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        int m = sc.nextInt();
        int p = sc.nextInt();
        int q = sc.nextInt();
       
        //int[] ans = new int[q];
        for (int i = 0; i < q ; i++){ 
            int x = sc.nextInt();
            int f = sc.nextInt();
            
            int cnt = 0;
            for (int j = 1; j <= m ; j++){ 
             
                if((x * j) % p == f){
                    cnt++;   
                }
                
            }
            
            System.out.println(cnt);
            
        }
         
    }
   
}