This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
int n;
int odl(int a, int b){
int wynik=abs(a-b);
wynik = min(wynik, (2*n)-max(a,b)+min(a,b));
return wynik;
}
int main()
{
int m,q,a,b;
cin >> n >> m >> q;
vector<int> pary(0);
for (int i=0; i<m; i++){
cin >> a;
pary.push_back(a);
pary.push_back(a+n);
}
sort(pary.begin(),pary.end());
/*
//for (auto [i_1,i_2] : pary) cout << i_1 << " " << i_2 << endl;
//liczymy pierwszy na lewo
int akt_para = 1;
int akt_idx = pary[0];
vector<int> lewo(2*n);
for (int i=0; i<2*n; i++){
if (akt_para < pary.size() && pary[akt_para]==akt_idx){
akt_para++;
}
//cout << akt_idx << endl;
lewo[akt_idx] = pary[akt_para-1];
cout << akt_idx << " " << lewo[akt_idx] << endl;
akt_idx = (akt_idx+1)%(2*n);
}
//Liczymy pierwszy na prawo
akt_para = (2*m)-2;
akt_idx = pary[(2*m)-1];
vector<int> prawo(2*n);
for (int i=0; i<2*n; i++){
//cout << "DUPA " << (akt_idx-1+(2*n))%(2*n) << " " << akt_idx << endl;
if (akt_para >=0 && pary[akt_para]==akt_idx){
akt_para--;
}
prawo[akt_idx] = pary[akt_para+1];
cout << akt_idx << " " << prawo[akt_idx] << endl;
akt_idx = (akt_idx-1+(2*n))%(2*n);
}*/
for (int i=0; i<q; i++){
cin >> a >> b;
int lewo,prawo;
//prawo
int lewo_=0,prawo_=(2*m)-1;
while (lewo_<prawo_){
int mid = (lewo_+prawo_)/2;
//cout << lewo_ << " " << prawo_ << " " << mid << endl;
if (pary[mid]>=a) prawo_=mid;
else lewo_ = mid+1;
}
if (pary[lewo_]>=a) prawo = pary[lewo_];
else prawo = pary[0];
//lewo
lewo_=0,prawo_=(2*m)-1;
while (lewo_<prawo_){
int mid = (lewo_+prawo_+1)/2;
//cout << "TU: " << lewo_ << " " << prawo_ << " " << mid << endl;
if (pary[mid]<=a) lewo_=mid;
else prawo_ = mid-1;
}
//cout << pary[lewo_] << " " << lewo_ << endl;
if (pary[lewo_]<=a) lewo = pary[lewo_];
else lewo = pary[(2*m)-1];
//cout << a << " " << b<< " " << lewo << " " << prawo << endl;
int wynik = odl(a,b);
wynik = min(wynik, 1+odl(a,prawo) + odl(((prawo+n)%(2*n)), b));
wynik = min(wynik, 1+odl(a,lewo) + odl(((lewo+n)%(2*n)), b));
cout << wynik << endl;
}
return 0;
}
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