#include <bits/stdc++.h>
#include <atcoder/all>
#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
namespace mp = boost::multiprecision;
using Bint = mp::cpp_int;
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    ll x,y,n;
    cin >> x >> y >> n;
    rep(i,n) {
        ll u, v;
        cin >> u >> v;
        if(u==v) {
            cout << 0 << endl;
            continue;
        }
        ll k1 = (u+y-1)/y;
        ll l1 = u%y;
        if (l1==0) l1+=y;
        ll k2 = (v+y-1)/y;
        ll l2 = v%y;
        if (l2==0) l2+=y;
        dbg(k1,k2,l1,l2);
        if(k1==0 || k2==0) {
            cout << max(l1,l2) << endl;
        }
        else if(k1==k2) {
            cout << abs(l2-l1) << endl;
        }
        else{
            cout << l1+l2 <<endl;
        }
    }
    return 0;
}