#include<bits/stdc++.h>
using namespace std;
int main()
{
ios_base::sync_with_stdio(0);cin.tie(0);
long long n;int m,q;cin>>n>>m>>q;
vector<pair<long long,long long>>v;
for(int i=0;i<m;i++){
int x;cin>>x;
v.push_back({x,x+n});
}
while(q--){
long long x,y;cin>>x>>y;
long long rs=min(abs(x-y),2*n-abs(x-y));
for(auto it : v)rs=min({rs,abs(x-it.first)+abs(y-it.second)+1,abs(x-it.second)+abs(y-it.first)+1});
cout<<rs<<'\n';
}
return 0;
}
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