#include <bits/stdc++.h>
using namespace std;
int main() {
  int t, a, b, i, j, s;
  cin >> t;
  while (t--) {
    int a, b;
    cin >> a >> b;
    if (a == b) {
      cout << "0" << endl;
    } else if (a > b) {
      if ((a - b) % 2 == 0)
        cout << "1" << endl;
      else
        cout << "2" << endl;
    } else {
      if ((a - b) % 2 == 0)
        cout << "2" << endl;
      else
        cout << "1" << endl;
    }
  }
}
