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