#include <bits/stdc++.h>
using namespace std;
int main() {
  int test;
  cin >> test;
  for (int u = 0; u < test; u++) {
    int a, b;
    cin >> a >> b;
    if (b > a) {
      if ((b - a) % 2 == 0)
        cout << "2" << endl;
      else
        cout << "1" << endl;
    } else if (a > b) {
      if ((a - b) % 2 == 0)
        cout << "1" << endl;
      else
        cout << "2" << endl;
    } else
      cout << "0" << endl;
  }
  return 0;
}
