#include <bits/stdc++.h>

using i64 = long long;

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int A, B;
    std::cin >> A >> B;
    
    int ans = A + B;
    for (int i = std::abs(A - B); i <= A + B; i += 2) {
        ans = std::min(ans, std::abs(i -( A + B - i)));
    }
    std::cout << ans << "\n";
    
    return 0;
}