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