#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 5;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  int t;
  cin >> t;
  while (t--) {
    int a, b;
    cin >> a >> b;
    if (a > b) {
      if ((a - b) % 2 != 0)
        cout << 2 << endl;
      else
        cout << 1 << endl;
    } else if (a < b) {
      if ((b - a) % 2 != 0)
        cout << 1 << endl;
      else
        cout << 2 << endl;
    } else if (a == b)
      cout << 0 << endl;
  }
}
