#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
#include<unordered_set>
#include<unordered_map>
using namespace std;
typedef long long ll;
#define mod 1000000007
#define mad(a,b) a=(a+b)%mod;

int main(){
  ll a,b;cin>>a>>b;
  cout<<abs(a-b)<<endl;
  return 0;
}

