#include <iostream>
using namespace std;
int main(void){
     int x1,x2;
     cin>>x1>>x2;
     if(x1<x2){cout<<x2-x1<<endl;}
     else if (x1>x2){cout<<x1-x2<<endl;}
     else if (x1==x2){cout<<"0"<<endl;}
    
     
    
}

