#include <bits/stdc++.h>
using namespace std;
#define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++)
#define REP(i, n) FOR(i,0,n)
template <typename T> bool chmin(T &m, const T q) { return m > q ? (m = q, true) : false; }

int main() {
    int A, B;
    cin >> A >> B;
    int ret = 1e9;
    REP(a, A + 1) {
        int n = a;
        int m = B - (A - a);
        if (n < 0 or m < 0) continue;
        int p = A - n;
        int q = B - m;
        if (p < 0 or q < 0) continue;
        chmin(ret, abs(n + m - (p + q)));
    }
    cout << ret << endl;
}