#include <bits/stdc++.h>
using namespace std;
#define rep(i, n)  for(long long i=0;i<(long long)(n);i++)
#define REP(i,k,n) for(long long i=k;i<(long long)(n);i++)
typedef long long ll;
#define all(a) a.begin(),a.end()
#define lb(v,k) (lower_bound(all(v),(k))-v.begin())
ll cons=1000000000000000;
ll inf=1001001001001001001;
using vi=vector<ll>;
using vvi=vector<vi>;
typedef pair<ll,ll> P;
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
template<class T> void out(T a){cout<<a<<'\n';}
template<class T> void outp(T a){cout<<'('<<a.first<<','<<a.second<<')'<<'\n';}
class sparsetable{
    vi tmp;
    vvi Lmi,Rmi,Lma,Rma;
    vi rng;
public:
    sparsetable(vi v){
        rng.resize(v.size());
        rep(c,20)REP(i,1<<c,1<<(c+1))if(i<v.size())rng[i]=c;
        Lmi=vvi(20,vi(v.size()));
        Lma=vvi(20,vi(v.size()));
        Rmi=vvi(20,vi(v.size()));
        Rma=vvi(20,vi(v.size()));
        rep(i,v.size()){
            Lmi[0][i]=v[i];
            Lma[0][i]=v[i];
            Rmi[0][i]=v[i];
            Rma[0][i]=v[i];
        }
        rep(c,19)rep(i,v.size()){
            ll ni=i+(1<<c);
            if(ni<v.size()){
                Lmi[c+1][i]=min(Lmi[c][i],Lmi[c][ni]);
                Lma[c+1][i]=max(Lma[c][i],Lma[c][ni]);
            }
            ni=i-(1<<c);
            if(ni>=0){
                Rmi[c+1][i]=min(Rmi[c][i],Rmi[c][ni]);
                Rma[c+1][i]=max(Rma[c][i],Rma[c][ni]);
            }
        }
    }
    ll mi(ll l,ll r){
        if(l>=r)return inf;
        return min(Lmi[rng[r-l]][l],Rmi[rng[r-l]][r-1]);
    }
    ll ma(ll l,ll r){
        if(l>=r)return -inf;
        return max(Lma[rng[r-l]][l],Rma[rng[r-l]][r-1]);
    }
};
int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll L,n,q;cin>>L>>n>>q;
    vi difpoint(n+3);rep(i,n)cin>>difpoint[i+1];difpoint[n+1]=inf/2;difpoint[n+2]=inf;
    n+=3;
    vvi tablema(20,vi(n)),tablemi(20,vi(n));
    rep(i,n)tablema[0][i]=tablemi[0][i]=0;
    vi v(n);
    rep(i,n-1){
        if(i%2)v[i+1]=v[i]-difpoint[i+1]+difpoint[i];
        else v[i+1]=v[i]+difpoint[i+1]-difpoint[i];
    }
    sparsetable sp(v);
    return 0;
    rep(c,19)rep(i,n){
        ll ni=i+(1<<c);
        tablema[c+1][i]=tablema[c][i];
        tablemi[c+1][i]=tablemi[c][i];
        if(ni<n){
            chmax(tablema[c+1][i],tablema[c][ni]);
            chmin(tablemi[c+1][i],tablemi[c][ni]);
            ll nni=min(ni+(1<<c),n);
            chmax(tablema[c+1][i],sp.ma(ni,nni)-sp.mi(i,ni));
            chmin(tablemi[c+1][i],sp.mi(ni,nni)-sp.ma(i,ni));
        }
    }
    auto val=[&](ll t){
        ll l=lb(difpoint,t);
        if(l%2)return v[l]-difpoint[l]+t;
        return v[l]+difpoint[l]-t;
    };
    ll ans=0;
    rep(qq,q){
        ll x,t;cin>>x>>t;
        x+=ans;t+=ans;x%=L;t%=cons;
        // outp(P(x,t));
        ll idx=lb(difpoint,t);
        ll cur=val(t);
        ll ok=n,ng=idx-1;
        while(ok-ng>1){
            ll md=(ok+ng)/2;
            if(sp.ma(idx,md+1)-cur>=x||sp.mi(idx,md+1)-cur<=x-L)ok=md;
            else ng=md;
        }
        // out(ok);
        ll d=max(v[ok]-cur-x,x-L-v[ok]+cur);assert(d>=0);
        ans=difpoint[ok]-d;
        // out(ans);
        ll r=idx;
        for(int c=19;c>=0;c--){
        // out(r);
            ll nr=r+(1<<c);
            ll ma=max(tablema[c][r],sp.ma(r,min(nr,n))-sp.mi(idx,r));
            ll mi=min(tablemi[c][r],sp.mi(r,min(nr,n))-sp.ma(idx,r));
            if(ma>=x||mi<=x-L)continue;
            r=nr;
        }
        d=max(v[r]-sp.mi(idx,r+1)-x,x-L-v[r]+sp.ma(idx,r+1));assert(d>=0);
        chmin(ans,difpoint[r]-d);
        ans-=t;
        out(ans);
    }
}