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