Question

[Tran Quang Kiet]

#include <iostream>
using namespace std;
int main()
{
  int t;
  cin >> t;
  for (int i = 0; i < t; i++)
    {
    int a, b;
    cin >> a >> b;
    int diff = abs(a - b);
    cout << diff << endl;
  }
  return 0;
}