#include<iostream>
#include<cmath>

using namespace std;

int main() {
  int a, b;
  cin >> a >> b;
  int x = abs(b + a) / 2;
  if (abs(b + a) % 2)
    x++;
  int y = abs(a - b) / 2;
  if (abs(a - b) % 2)
    y++;
  if (abs(x - y) == b && x + y == a)
    cout << x << " " << y;
  else
    cout << 0 << " " << 0;
}