3 3 20
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1 9
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2 14
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17 7
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14 14
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6 10
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 10 10 10
12 10
8 4
10 8
15 13
11 11
8 6
9 19
13 19
6 4
19 19
 3 3 20
5 5
6 6
6 6
6 2
6 4
6 6
6 6
5 3
5 5
6 4
6 2
5 1
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6 6
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6 2
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6 4
5 3
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 3 3 20
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2 2
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 10 10 10
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 3 1 20
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 10 10 10
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14 12
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 1 1 100
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1 7
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2 6
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#include <bits/stdc++.h>
using namespace std;
struct node {
  int l, r, minw, maxb, ok;
  node *lson, *rson;
  inline void upd() {
    if (l < r) {
      ok = (lson->minw > rson->maxb);
      ok &= lson->ok;
      ok &= rson->ok;
      minw = min(lson->minw, rson->minw);
      maxb = max(lson->maxb, rson->maxb);
    } else
      ok = (minw > maxb);
  }
} * root, pool[1111111];
int top;
int T, n, m, q;
node *build(int l, int r) {
  node *tmp = &pool[top++];
  tmp->l = l;
  tmp->r = r;
  tmp->minw = m + 1;
  tmp->maxb = 0;
  tmp->ok = 1;
  if (l < r) {
    int mid = (l + r) / 2;
    tmp->lson = build(l, mid);
    tmp->rson = build(mid + 1, r);
  }
  return tmp;
}
void changew(node *cur, int pos, int val) {
  if (cur->l == cur->r) {
    cur->minw = val;
    cur->upd();
    return;
  }
  if (pos <= cur->lson->r)
    changew(cur->lson, pos, val);
  else
    changew(cur->rson, pos, val);
  cur->upd();
}
void changeb(node *cur, int pos, int val) {
  if (cur->l == cur->r) {
    cur->maxb = val;
    cur->upd();
    return;
  }
  if (pos <= cur->lson->r)
    changeb(cur->lson, pos, val);
  else
    changeb(cur->rson, pos, val);
  cur->upd();
}
set<int> b[233333], w[233333];
int main() {
  ios_base::sync_with_stdio(false);
  cin >> n >> m >> q;
  for (int i = 1; i <= n; i++) b[i].insert(0), w[i].insert(m + 1);
  root = build(1, n);
  int x, y;
  for (int i = 1; i <= q; i++) {
    cin >> x >> y;
    if (x % 2 == 1) {
      x = (x + 1) / 2, y = (y + 1) / 2;
      if (w[x].find(y) != w[x].end()) {
        w[x].erase(y);
      } else {
        w[x].insert(y);
      }
      changew(root, x, *w[x].begin());
    } else {
      x = x / 2, y = y / 2;
      if (b[x].find(y) != b[x].end()) {
        b[x].erase(y);
      } else {
        b[x].insert(y);
      }
      changeb(root, x, *--b[x].end());
    }
    if (root->ok)
      cout << "YES" << endl;
    else
      cout << "NO" << endl;
  }
  return 0;
}
