using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (x, y, n) = (c[0], c[1], c[2]);
        var ans = new long[n];
        for (var i = 0; i < n; ++i)
        {
            c = NList;
            var ui = c[0] == 0 ? -1 : ((c[0] - 1) / y);
            var vi = (c[1] - 1) / y;
            var ud = c[0] == 0 ? 0 : c[0] % y == 0 ? y : (c[0] % y);
            var vd = c[1] % y == 0 ? y : (c[1] % y);
            if (ui == -1 || ui == vi) ans[i] = Math.Abs(ud - vd);
            else ans[i] = ud + vd;
        }
        WriteLine(string.Join("\n", ans));
    }
}