#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

ll x, y;

ll f(ll u, ll v) {
    if(u==v) {
        return 0;
    }
    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) {
       return max(l1,l2);
    }
    else if(k1==k2) {
        return abs(l2-l1);
    }
    else{
        return l1+l2;
    }
}

int main()
{
    ll n;
    cin >> x >> y >> n;
    rep(i,n) {
        ll u, v;
        cin >> u >> v;
        cout << f(u, v) << endl;
    }
    return 0;
}