#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
vector<int> order;
struct Comp {
  bool operator() (const pair<int, int>& x, const pair<int, int>& y) const {
    if (x.first != y.first) return x.first < y.first;
    return order[x.second] < order[y.second];
  }
};
signed main() { 
  ios::sync_with_stdio(false); cin.tie(0);
  int n, k1, k2;
  cin >> n >> k1 >> k2;
  order = vector<int>(n + 1);
  order[k1] = 0;
  order[k2] = 1;
  int c = 2;
  for (int i = k1 - 1; i >= 1; i--) {
    order[i] = c;
    c += 2;
  }
  c = 3;
  for (int i = k2 + 1; i <= n; i++) {
    order[i] = c;
    c += 2;
  }
  set<pair<int, int>, Comp> available;
  vector<bool> occupy(n + 5);
  auto whenCome = [&] (int idx) {
    occupy[idx] = true;
    available.erase(make_pair(0, idx));
    available.erase(make_pair(1, idx));
    if (idx - 1 >= 1 && !occupy[idx - 1]) {
      available.erase(make_pair(0, idx - 1));
      available.insert(make_pair(1, idx - 1));
    }
    if (idx + 1 <= n && !occupy[idx + 1]) {
      available.erase(make_pair(0, idx + 1));
      available.insert(make_pair(1, idx + 1));
    }
  };
  auto whenLeave = [&] (int idx) {
    occupy[idx] = false;
    if (!occupy[idx - 1] && !occupy[idx + 1]) available.insert(make_pair(0, idx));
    else available.insert(make_pair(1, idx));
    if (!occupy[idx - 1]) {
      if (idx - 1 >= 1 && !occupy[idx - 2]) {
        available.erase(make_pair(1, idx - 1));
        available.insert(make_pair(0, idx - 1));
      }
    }
    if (!occupy[idx + 1]) {
      if (idx + 1 <= n && !occupy[idx + 2]) {
        available.erase(make_pair(1, idx + 1));
        available.insert(make_pair(0, idx + 1));
      }
    }
  };
  auto come = [&] () {
    if (available.empty()) return -1;
    int idx = available.begin()->second;
    whenCome(idx);
    return idx;
  };
  for (int i = 1; i <= n; i++) available.insert(make_pair(0, i));
  int q;
  cin >> q;
  vector<int> a(q), b(q);
  for (int i = 0; i < q; i++) cin >> a[i] >> b[i];
  {
    priority_queue<int, vector<int>, greater<int>> que;
    for (int i = 0; i < q; i++) {
      while (!que.empty() && que.top() <= a[i]) que.pop();
      if ((int) que.size() < n) {
        que.push(a[i] + b[i]);
        continue;
      }
      int mx = que.top();
      while (!que.empty() && que.top() <= mx) que.pop();
      a[i] = mx;
      que.push(a[i] + b[i]);
    }
  }
  priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> que;
  vector<int> ans(q);
  for (int i = 0; i < q; i++) {
    while (!que.empty() && que.top().first <= a[i]) {
      int p = que.top().second;
      que.pop();
      whenLeave(ans[p]);
    }
    int idx = come();
    ans[i] = idx;
    que.emplace(a[i] + b[i], i);
  }
  for (auto& x : ans) cout << x << '\n';
  return 0;
}