import java.util.*;

class Main
{
public static void main(String[] args)
{
Scanner sc=new Scanner (System.in);
int a=sc.nextInt(),b=sc.nextInt();
int cnt=0;
for(int i=0;i>-a-b;i--)
{
cnt--;
}
System.out.println((int)Math.abs(cnt));
}
}