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