Language: C++

#include <iostream>
#include <fstream>
#include <cmath>  
#include <cstdlib>
#include <ctime>
#include <algorithm>
#include <numeric>
#include <functional>
#include <string> 
#include <vector>
#include <bitset>
#include <map>
#include <set>
#include <stack>
#include <queue>
#include <deque>

using namespace std;
using ll = long long;
using ull = unsigned long long;

#define REP(i,n) for(long long i = 0; i < (n); i++)
#define FOR(i, m, n) for(long long i = (m);i < (n); ++i)
#define ALL(obj) (obj).begin(),(obj).end()

template<class T> using V = vector<T>;
template<class T, class U> using P = pair<T, U>;

const ll MOD = (ll)1e9 + 7;
const ll MOD2 = 998244353;
const ll LLINF = (ll)1e18;
const ll INTINF = (ll)1e9;
const long double PI = 3.1415926535897932384626433;

template <class T> void corner(bool flg, T hoge) { if (flg) { cout << hoge << endl; exit(0); } }
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) { o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o; }
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) { o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o; }
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) { o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o; }
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) { o << "{" << obj.first << ", " << obj.second << "}"; return o; }
template <template <class tmp>  class T, class U> ostream &operator<<(ostream &o, const T<U> &obj) { o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr)o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o; }
void print(void) { cout << endl; }
template <class Head> void print(Head&& head) { cout << head; print(); }
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) { cout << head << " "; print(forward<Tail>(tail)...); }
template <class T> void chmax(T& a, const T b) { a = max<T>(a, b); }
template <class T> void chmin(T& a, const T b) { a = min<T>(a, b); }
void YN(bool flg) { cout << ((flg) ? "YES" : "NO") << endl; }
void Yn(bool flg) { cout << ((flg) ? "Yes" : "No") << endl; }
void yn(bool flg) { cout << ((flg) ? "yes" : "no") << endl; }
#define int long long

signed main() {
	ll X, K; cin >> X >> K;
	V<ll> r(K + 2, 0), u(K + 2, 0), v(K + 2, 0), w(K + 2, 0);
	for (int i = 1; i <= K; ++i) cin >> r[i]; r[K + 1] = 10000000000;
	int Q; cin >> Q;
	V<ll> t(Q), a(Q);
	for (int i = 0; i < Q; ++i) cin >> t[i] >> a[i];
	V<P<ll, int>> ord(Q);
	for (int i = 0; i < Q; ++i) ord[i] = { a[i],i };
	sort(ALL(ord));
	for (int i = 1; i <= K + 1; ++i) w[i] = w[i - 1] + (i % 2 ? -1 : 1)*r[i];

	u[0] = 0;
	v[0] = X;
	for (int i = 1; i <= K + 1; ++i) {
		if (i % 2) {
			u[i] = max(u[i - 1] - (r[i] - r[i - 1]), 0LL);
			v[i] = max(v[i - 1] - (r[i] - r[i - 1]), 0LL);
		}
		else {
			u[i] = min(u[i - 1] + (r[i] - r[i - 1]), X);
			v[i] = min(v[i - 1] + (r[i] - r[i - 1]), X);
		}
	}

	V<int> idx(Q, K);
	for (int i = 0, j = 1; i < Q && j <= K + 1; ++i) {
		int k = ord[i].second;

		if (a[k] == 0) {
			chmin(idx[k], 0);
			continue;
		}

		while (a[k] + w[j] > 0) {
			if (j + 2 <= K + 1) j += 2;
			else break;
		}
		chmin(idx[k], j - 1);
	}
	for (int i = Q - 1, j = 2; 0 <= i && j <= K + 1; --i) {
		int k = ord[i].second;

		if (a[k] == 0) {
			chmin(idx[k], 0);
			continue;
		}

		while (a[k] + w[j] <= X) {
			if (j + 2 <= K + 1) j += 2;
			else break;
		}
		chmin(idx[k], j - 1);
	}
	V<ll> ans(Q);
	for (int i = 0; i < Q; ++i) {
		if (t[i] == 0) {
			ans[i] = a[i];
			continue;
		}
		int s = upper_bound(ALL(r), t[i]) - r.begin();
		s--;
		if (s <= idx[i]) {
			ans[i] = a[i] + w[s] + (s % 2 ? 1 : -1)*(t[i] - r[s]);
			if (s % 2) chmin(ans[i], X);
			else chmax(ans[i], 0LL);
		}
		else {
			if (idx[i] % 2) {
				ans[i] = v[s] + (s % 2 ? 1 : -1)*(t[i] - r[s]);
			}
			else {
				ans[i] = u[s] + (s % 2 ? 1 : -1)*(t[i] - r[s]);
			}
			if (s % 2) chmin(ans[i], X);
			else chmax(ans[i], 0LL);
		}
	}
	for (int i = 0; i < Q; ++i) cout << ans[i] << endl;
	
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:81:30: error: no matching function for call to 'chmin(__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&, int)'
   81 |                         chmin(idx[k], 0);
      |                         ~~~~~^~~~~~~~~~~
a.cc:45:25: note: candidate: 'template<class T> void chmin(T&, T)'
   45 | template <class T> void chmin(T& a, const T b) { a = min<T>(a, b); }
      |                         ^~~~~
a.cc:45:25: note:   template argument deduction/substitution failed:
a.cc:81:30: note:   deduced conflicting types for parameter 'T' ('long long int' and 'int')
   81 |                         chmin(idx[k], 0);
      |                         ~~~~~^~~~~~~~~~~
a.cc:95:30: error: no matching function for call to 'chmin(__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&, int)'
   95 |                         chmin(idx[k], 0);
      |                         ~~~~~^~~~~~~~~~~
a.cc:45:25: note: candidate: 'template<class T> void chmin(T&, T)'
   45 | template <class T> void chmin(T& a, const T b) { a = min<T>(a, b); }
      |                         ^~~~~
a.cc:45:25: note:   template argument deduction/substitution failed:
a.cc:95:30: note:   deduced conflicting types for parameter 'T' ('long long int' and 'int')
   95 |                         chmin(idx[k], 0);
      |                         ~~~~~^~~~~~~~~~~