function Main(ldata){
  data = ldata.trim().split(" ");
  if(Math.abs(Number(data[0]))==Math.abs(Number(data[1]))){
  	console.log("1");
  } else if(data[0]=="0" || data[1]=="0"){
  	console.log("1");
  } else{
  	console.log("2");
  }
};

Main(require('fs').readFileSync('/dev/stdin','utf8'));