#include <bits/stdc++.h>
using namespace std;
void solve() {
  int a, b;
  cin >> a >> b;
  if (a == b) {
    cout << "0\n";
  } else if (b > a) {
    if ((b - a) % 2 != 0)
      cout << "1\n";
    else
      cout << "2\n";
  } else if (a > b) {
    if ((a - b) % 2 != 0)
      cout << "2\n";
    else
      cout << "1\n";
  }
}
int main() {
  int t;
  cin >> t;
  while (t--) {
    solve();
  }
  return 0;
}
