#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0), cout.tie(0);
  int t;
  cin >> t;
  while (t--) {
    int a, b;
    cin >> a >> b;
    if (a == b)
      cout << 0 << endl;
    else if (b > a) {
      if ((b - a) % 2 == 0)
        cout << 2 << endl;
      else
        cout << 1 << endl;
    } else {
      if ((a - b) % 2 == 0)
        cout << 1 << endl;
      else
        cout << 2 << endl;
    }
  }
  return 0;
}
