[编程题] 集合代码

import java.util.*;
 
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while(in.hasNext()) {
            int w = in.nextInt();
            int x = in.nextInt();
            int y = in.nextInt();
            int z = in.nextInt();
            solve(w,x,y,z);
        }
    }
     
    private static void solve(int w,int x, int y, int z) {
         
        Set<Double> set = new HashSet<>();
         
        for(int i=w;i<=x;i++) {
            for(int j=y;j<=z;j++) {
                set.add(i*1.0/j);
            }
        }
         
        System.out.println(set.size());
    }
}