import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class No383 { public static void main(String[] args) { try{ BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String[] str = br.readLine().split(" "); int before = Integer.parseInt(str[0]); int after = Integer.parseInt(str[1]); getDifference(before,after); }catch(IOException e){ e.getStackTrace(); }catch(NumberFormatException e){ e.getStackTrace(); } } public static void getDifference(int x, int y){ int ans = y - x; if(x