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

int N,X,Y;

signed main(){
  cin>>X>>Y>>N;
  for(int i = 0; i < N; i++){
  	int u,v; cin>>u>>v;
  	int uz = (u-1) / Y;
  	int up = u - uz * Y;
  	int vz = (v-1) / Y;
  	int vp = v - vz * Y;
  	if(u == 0){
  		cout << vp << "\n";
  	}
  	else{
  		if(uz == vz){
  			cout << vp - up << "\n";
  		}
  		else{
  			cout << up + vp << "\n";
  		}
  	}
  }
}