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