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