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