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