CodeForces/A_Minimal_Coprime.cpp at master · Ash8389/CodeForces · GitHub

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#include <bits/stdc++.h>
using namespace std;

void solve()
{
    int a, b;
    cin >> a >> b;

    if (a == 1 && b == 1)
    {
        cout << 1 << endl;
        return;
    }

    cout << b - a << endl;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int t;
    cin >> t;

    while (t--)
    {
        solve();
    }

    return 0;
}