#include <bits/stdc++.h>
using namespace std;
int main() {
  int i, j, k, t, n, sum = 0;
  vector<int> vec;
  cin >> t;
  for (k = 1; k <= t; k++) {
    int a, b;
    cin >> a >> b;
    if (a == b)
      cout << 0 << endl;
    else if ((a < b && (b - a) % 2 != 0) || (a > b && (a - b) % 2 == 0))
      cout << 1 << endl;
    else
      cout << 2 << endl;
  }
}
