using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

class TEST{
	static void Main(){
		Sol mySol = new Sol();
		mySol.Solve();
	}
}

class Sol{
	public void Solve(){
		
		for(int t=1;t<10000;t++){
			if(isOK(t)){
				Console.WriteLine(t);
				return;
			}
		}
		
	}
	
	static int A,B;
	static bool isOK(int tot){
		for(int j=0;j<tot;j++){
			int a = j;
			int b = tot - j;
			if(A == Math.Round((100.0*a)/tot) && B == Math.Round((100.0*b)/tot) )return true;
		}
		return false;
	}
	
	public Sol(){
		var d = ria();
		A = d[0]; B = d[1];
	}

	static String rs(){return Console.ReadLine();}
	static int ri(){return int.Parse(Console.ReadLine());}
	static long rl(){return long.Parse(Console.ReadLine());}
	static double rd(){return double.Parse(Console.ReadLine());}
	static String[] rsa(char sep=' '){return Console.ReadLine().Split(sep);}
	static int[] ria(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>int.Parse(e));}
	static long[] rla(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>long.Parse(e));}
	static double[] rda(char sep=' '){return Array.ConvertAll(Console.ReadLine().Split(sep),e=>double.Parse(e));}
}