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