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