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