import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayDeque;
import java.util.HashSet;
import java.util.PriorityQueue;
import java.util.Queue;
import java.util.Set;
import java.util.TreeSet;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] sa = br.readLine().split(" ");
		int n = Integer.parseInt(sa[0]);
		int k1 = Integer.parseInt(sa[1]) - 1;
		int k2 = Integer.parseInt(sa[2]) - 1;
		int q = Integer.parseInt(br.readLine());
		Obj[] arr = new Obj[q];
		for (int i = 0; i < q; i++) {
			sa = br.readLine().split(" ");
			Obj o = new Obj();
			o.a = Integer.parseInt(sa[0]);
			o.t = o.a + Integer.parseInt(sa[1]);
			o.v = o.a;
			arr[i] = o;
		}
		br.close();

		int[] id = new int[n];
		int[] di = new int[n * 2];
		di[0] = k1;
		for (int i = k1 - 1; i >= 0; i--) {
			id[i] = (k1 - i) * 2;
			if (k2 < k1) {
				id[i]--;
			}
			di[id[i]] = i;
		}
		for (int i = k1 + 1; i < n; i++) {
			id[i] = (i - k1) * 2;
			if (k2 > k1) {
				id[i]--;
			}
			di[id[i]] = i;
		}

		TreeSet<Integer> set1 = new TreeSet<>();
		TreeSet<Integer> set2 = new TreeSet<>();
		Set<Integer> set3 = new HashSet<>();
		for (int i = 0; i < n; i++) {
			set1.add(id[i]);
		}

		PriorityQueue<Obj> que = new PriorityQueue<>((o1, o2) -> {
			if (o1.v != o2.v) {
				return o1.v - o2.v;
			}
			if (o1.t == o1.v) {
				return -1;
			}
			if (o2.t == o2.v) {
				return 1;
			}
			return 0;
		});
		for (int i = 0; i < q; i++) {
			que.add(arr[i]);
		}
		Queue<Obj> que2 = new ArrayDeque<>();

		int cnt = 0;
		while (!que.isEmpty()) {
			Obj cur = que.poll();
			if (cur.t == cur.v) {
				int d = id[cur.i];
				if (d == 0) {
					if (set2.contains(1) && set2.contains(2)) {
						set1.add(0);
					} else {
						set2.add(0);
					}
				} else if (d == 1) {
					if (set2.contains(0) && set2.contains(3)) {
						set1.add(1);
					} else {
						set2.add(1);
					}
				} else {
					if (set2.contains(d - 2) && set2.contains(d + 2)) {
						set1.add(d);
					} else {
						set2.add(d);
					}
				}
				cnt++;
				Obj next = que.peek();
				if (next != null && next.v == cur.v && next.t == next.v) {
					set3.add(d);
					continue;
				}
				if (cnt > 1) {
					set3.add(d);
					for (int o : set3) {
						if (o == 0) {
							if ((set1.contains(1) || set2.contains(1))
									&& (set1.contains(2) || set2.contains(2))) {
								set1.add(0);
							}
						} else if (o == 1) {
							if ((set1.contains(0) || set2.contains(0))
									&& (set1.contains(3) || set2.contains(3))) {
								set1.add(1);
							}
						} else {
							if ((set1.contains(o - 2) || set2.contains(o - 2))
									&& (set1.contains(o + 2) || set2.contains(o + 2))) {
								set1.add(o);
							}
						}
					}
					for (int o : set3) {
						if (set1.contains(o)) {
							set2.remove(o);
						}
					}
					set3.clear();
				}
				while (!que2.isEmpty() && cnt > 0) {
					que.add(que2.poll());
					cnt--;
				}
			} else {
				Integer d = set1.pollFirst();
				if (d == null) {
					d = set2.pollFirst();
					if (d == null) {
						que2.add(cur);
						cnt = 0;
						continue;
					}
				} else {
					if (d == 0 && set1.remove(d + 1)) {
						set2.add(d + 1);
					}
					if (set1.remove(d + 2)) {
						set2.add(d + 2);
					}
				}
				cur.i = di[d];
				cur.v = cur.t;
				que.add(cur);
			}
		}

		PrintWriter pw = new PrintWriter(System.out);
		for (int i = 0; i < q; i++) {
			pw.println(arr[i].i + 1);
		}
		pw.flush();
		pw.close();
	}

	static class Obj {
		int i, a, t, v;
	}
}