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