import java.util.Arrays;
import java.util.Scanner;

public class N338
{
	public static void main(String[] args)
	{
		Scanner sc=new Scanner(System.in);
		int[] a=new int[2];a[0]=sc.nextInt();a[1]=sc.nextInt();
		double ans=2;
		int end=0;
		if(a[0]==a[1]){}
		else
		{
			Arrays.sort(a);
			while(true)
			{
				for(int i=1;i<=ans/2;i++)
				{
					if(a[0]==Math.round(100.0*((double)i)/ans)&&a[1]==Math.round(100.0*(ans-((double)i))/ans))
					{
						end=1;
						break;
					}
				}
				if(end==1){break;}
				ans++;
			}
		}
		System.out.println(Math.round(ans));
	}

}