import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner in=new Scanner(System.in);
        int rows=in.nextInt();
        int columns=in.nextInt();
        //System.out.println(rows+columns);
        if(rows==columns){
            System.out.println("0");
            return;
        }
        int smallSide=rows<columns?rows:columns;
        int largeSide=rows>columns?rows:columns;
        int cuts=largeSide%smallSide>0?largeSide/smallSide:largeSide/smallSide-1;
        System.out.println(cuts);
        
    }
}