No Palindrome

#include <bits/stdc++.h>

using namespace std;

#define ll     long long
#define _test   int _TEST; cin>>_TEST; while(_TEST--)
#define pb     push_back

int main()
{
    _test
    {
        ll int n, k;
        cin>>n>>k;

        ll int ans = 0;

        auto cl = [&](ll int a, ll int b)
        {
            return (a+b-1)/b;
        };

        ll int div = k + 2 + max((k+1)/2-1ll, 0ll);

        ans += cl(n, div);
        ans += 2ll * cl(max((n - k - 1), 0ll), div);

        cout<<ans<<"\n";
    }
}