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

#ifdef LOCAL
#define debug(x) cerr << #x << " = " << (x) << "\n"
#else
#define debug(x) void(0)
#endif

typedef long long ll;
typedef long double ld;
typedef pair<int, int> Pii;
typedef pair<ll, ll> Pll;

template <typename T>
ostream &operator<<(ostream &os, const vector<T> &v)
{
	for (int i = 0; i < (int)v.size(); i++)
		os << v[i] << (i + 1 == (int)v.size() ? "" : " ");
	return os;
}

template <typename T>
istream &operator>>(istream &is, vector<T> &v)
{
	for (int i = 0; i < (int)v.size(); i++)
		is >> v[i];
	return is;
}

////////////////////////////////////////////////////////////

int main()
{
	int X, Y, N;
	cin >> X >> Y >> N;
	while (N--)
	{
		ll U, V;
		cin >> U >> V;
		if (U == 0)
			cout << (V - 1) % Y + 1 << "\n";
		else if ((U - 1) / Y == (V - 1) / Y)
			cout << V - U << "\n";
		else
			cout << (U - 1) % Y + (V - 1) % Y + 2 << "\n";
	}
	return 0;
}