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