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