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