#include <bits/stdc++.h>
using namespace std;
long long a[100100];
int main() {
  long long t;
  cin >> t;
  while (t--) {
    int a, b;
    cin >> a >> b;
    if (b == a)
      cout << 0 << endl;
    else {
      if (b > a) {
        if ((b - a) % 2 == 1)
          cout << 1 << endl;
        else
          cout << 2 << endl;
      } else {
        if ((a - b) % 2 == 0)
          cout << 1 << endl;
        else
          cout << 2 << endl;
      }
    }
  }
  return 0;
}
