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