#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fi first
#define se second
#define pb push_back
#define sp <<' '<<
#define FOR(i,a) for(int i=0;i<(a);i++)
#define FORE(i,a,b) for(int i=(a);i<(b);i++)
#define cont(x) for(auto el:x) cout<<el<<endl;
#define contp(x) for(auto el:x) cout<<el.fi<<'-'<<el.se<<' ';cout<<endl;
#define DEBUG(x) cout<<#x sp x<<endl;
#define mid (l+r)/2
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pii> vii;
typedef vector<bool> vb;
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(0);cout.tie(0);
int n,m,q;
cin>>n>>m>>q;
vi aa(m);
set<int> s1;
FOR(i,m){
cin>>aa[i];
s1.insert(aa[i]);
s1.insert(aa[i]+n);
}
while(q--){
int x,y;
cin>>x>>y;
if(x>y) swap(x,y);
//x küçük olan, y büyük olan
int ans=min(y-x,2*n-(y-x));
int bir,iki;
bool ff=false;
if(s1.count(x)){
int deg=1;
if(x<n) {bir=x;iki=x+n;}
else {bir=x;iki=x-n;}
deg+=min(abs(bir-x),2*n-abs(bir-x));
deg+=min(abs(iki-y),2*n-abs(iki-y));
ans=min(ans,deg);
ff=true;
s1.erase(bir); s1.erase(iki);
}
if(!s1.empty()){
auto it=s1.upper_bound(x);
if(it==s1.end()) it=s1.begin();
if(it!=s1.end()){
int deg=1;
int temp;
if(*it<n) temp=*it+n;
else temp=*it-n;
deg+=min(abs(*it-x),2*n-abs(*it-x));
deg+=min(abs(temp-y),2*n-abs(temp-y));
ans=min(ans,deg);
}
if(it==s1.begin())it=s1.end();
if(it!=s1.begin()){
it--;
int deg=1;
int temp;
if(*it<n) temp=*it+n;
else temp=*it-n;
deg+=min(abs(*it-x),2*n-abs(*it-x));
deg+=min(abs(temp-y),2*n-abs(temp-y));
ans=min(ans,deg);
}
}
if(ff){
s1.insert(bir);
s1.insert(iki);
}
cout<<ans<<endl;
}
}
