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

int main(){
  using ll=long long;
  ll x,y,n;
  cin>>x>>y>>n;
  while (n--){
    ll ans=0;
    ll u,v;
    cin>>u>>v;
    if (u>v) swap(u,v);
    ll d1=(u-1)%y+1,d2=(v-1)%y+1;
    if (u==0) ans=d2;
    else{
      if ((u-1)/y==(v-1)/y) ans=abs(d1-d2);
      else ans=d1+d2;
    }
    cout<<ans<<endl;
  }
}