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