#include <bits/stdc++.h>
#define rng(i,a,b) for(ll i=ll(a);i<ll(b);i++)
#define rep(i,b) rng(i,0,b)
using namespace std;
using ll = long long;
signed main(void){
	int A,B;
	cin >> A >> B;
	cout << abs(A-B) << endl;
}