#include<bits/stdc++.h>
using namespace std;
int main(){
  int a,b;
  cin>>a>>b;
  if(a>b){
    cout<<a-b;
  }
  else if(a<b){
    cout<<b-a;
  }
  else if(a==b){
    cout<<0;
  }
  return 0;
}