#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) {
      int x = b - a;
      if (x % 2)
        cout << 1 << endl;
      else
        cout << 2 << endl;
    } else {
      int x = a - b;
      if (x % 2 == 0)
        cout << 1 << endl;
      else
        cout << 2 << endl;
    }
  }
}
