1409A - Yet Another Two Integers

using namespace std;
using ll = long long;
int main(void)
{
    int t;
    cin >> t;
    while (t--)
    {
        ll a, b;
        cin >> a >> b;
        ll diff = abs(b - a);
        ll ans = diff / 10 + ((diff % 10) > 0);
        cout << ans << endl;
    }
    return 0;
}