#include<iostream>
#include<cassert>
using namespace std;
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int X,Y,N;
	cin>>X>>Y>>N;
	auto f=[&](long u){
		assert(u!=0);
		return make_pair((u+Y-1)/Y,(u-1)%Y+1);
	};
	for(;N--;)
	{
		long U,V;cin>>U>>V;
		if(U==0)
		{
			auto p=f(V);
			cout<<p.second<<"\n";
		}
		else
		{
			auto p=f(U);
			auto q=f(V);
			if(p.first==q.first)cout<<abs(p.second-q.second)<<"\n";
			else cout<<p.second+q.second<<"\n";
		}
	}
}