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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main()
{
    long long X, Y, N;
    cin >> X >> Y >> N;

    auto ashi_id = [&](long long u) -> long long
    {
        return (u - 1) / Y;
    };

    auto ashi_depth = [&](long long u) -> long long
    {
        return (u - 1) % Y + 1;
    };

    auto f = [&](long long u, long long v) -> long long
    {
        if (u == v)
        {
            return 0;
        }

        if (u > v)
        {
            swap(u, v);
        }

        if (u == 0)
        {
            return ashi_depth(v);
        }

        if (ashi_id(u) == ashi_id(v))
        {
            return ashi_depth(v) - ashi_depth(u);
        }

        return ashi_depth(u) + ashi_depth(v);
    };

    rep(i, N)
    {
        long long U, V;
        cin >> U >> V;
        cout << f(U, V) << endl;
    }

    return 0;
}