3 3 20
4 4
2 4
2 2
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2 2
2 2
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5 5
3 5
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2 2
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5 5
3 5
5 5
2 2
3 3
 1 10 10
1 19
2 12
2 8
2 16
2 2
2 4
1 9
2 18
2 14
2 10
 10 10 10
2 6
17 7
5 19
14 14
10 10
16 2
6 10
7 17
18 2
17 1
 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
5 1
6 6
6 6
6 2
5 5
6 4
5 3
6 4
 3 3 20
1 1
4 4
1 1
4 4
3 3
1 1
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1 1
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3 1
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6 4
3 1
6 6
4 6
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4 6
4 6
5 1
 1 10 10
2 10
1 9
2 12
2 18
2 4
2 8
2 20
2 2
2 6
2 14
 10 10 10
2 10
4 6
1 19
7 15
20 18
3 19
11 17
9 17
16 2
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 3 1 20
3 1
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4 2
4 2
6 2
1 1
5 1
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2 2
4 2
2 2
6 2
4 2
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1 1
6 2
2 2
6 2
 10 10 10
10 12
19 7
14 12
10 10
8 6
19 19
18 2
12 2
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16 2
 1 1 100
2 2
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2 2
1 1
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 1 10 10
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6 6
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2 6
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2 6
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12 8
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9 9
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 2 3 20
1 3
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1 1
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1 3
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2 6
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6 2
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 10 10 10
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 1 1 20
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1 19
3 17
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5 19
5 17
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15 9
16 4
4 16
 1 10 10
2 4
2 8
2 6
1 17
1 9
1 15
2 10
1 11
2 2
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 10 10 10
9 17
9 13
8 10
12 2
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18 6
10 6
13 19
2 12
10 8
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2 6
5 9
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1 19
6 6
8 4
11 9
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4 6
10 2
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16 2
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8 2
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3 15
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7 17
4 16
11 9
2 6
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 1 2 1
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1 7
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1 11
1 15
1 17
1 7
2 14
 1 10 10
1 17
2 4
2 2
1 11
1 15
1 19
2 6
2 8
2 12
1 13

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#include <bits/stdc++.h>
using namespace std;
set<int> all[200005];
struct A {
  int l, r;
  int big;
  int small;
  int nxl, nxr;
} Node[2000005];
int now = 1, ss;
void build(int l, int r, int here, int tt) {
  Node[here].l = l;
  Node[here].r = r;
  if (tt == 0)
    Node[here].big = Node[here].small = 1000000000;
  else
    Node[here].big = Node[here].small = 0;
  if (l == r) {
    return;
  }
  Node[here].nxl = now++;
  Node[here].nxr = now++;
  build(l, (l + r) / 2, Node[here].nxl, tt);
  build((l + r) / 2 + 1, r, Node[here].nxr, tt);
}
void change(int where, int small, int big, int here) {
  if (where == Node[here].l && where == Node[here].r) {
    Node[here].small = small;
    Node[here].big = big;
    return;
  }
  if (where <= (Node[here].l + Node[here].r) / 2) {
    change(where, small, big, Node[here].nxl);
  } else {
    change(where, small, big, Node[here].nxr);
  }
  Node[here].big = max(Node[Node[here].nxl].big, Node[Node[here].nxr].big);
  Node[here].small =
      min(Node[Node[here].nxl].small, Node[Node[here].nxr].small);
  return;
}
pair<int, int> Find(int l, int r, int here) {
  pair<int, int> a, b;
  if (l == Node[here].l && r == Node[here].r)
    return make_pair(Node[here].small, Node[here].big);
  if (r <= (Node[here].l + Node[here].r) / 2)
    return Find(l, r, Node[here].nxl);
  else if (l > (Node[here].l + Node[here].r) / 2)
    return Find(l, r, Node[here].nxr);
  a = Find(l, (Node[here].l + Node[here].r) / 2, Node[here].nxl);
  b = Find((Node[here].l + Node[here].r) / 2 + 1, r, Node[here].nxr);
  return make_pair(min(a.first, b.first), max(a.second, b.second));
}
int main() {
  int N, M, K, i, j, x, y, l = 0, r, ok = 1, big = 0, t;
  scanf("%d %d %d", &N, &M, &K);
  for (i = 1; i <= 2 * N; i++) {
    if (i % 2)
      all[i].insert(1000000000);
    else
      all[i].insert(0);
  }
  build(1, 2 * N, 0, 0);
  ss = now;
  now++;
  build(1, 2 * N, ss, 1);
  for (i = 0; i < K; i++) {
    scanf("%d %d", &x, &y);
    if (all[x].find(y) == all[x].end())
      all[x].insert(y);
    else
      all[x].erase(y);
    change(x, *all[x].begin(), *prev(all[x].end()), ss * (1 - x % 2));
    if (x % 2) {
      if (Find(1, x, 0).first < Find(x + 1, 2 * N, ss).second)
        printf("NO\n");
      else
        printf("YES\n");
    } else {
      if (Find(1, x - 1, 0).first < Find(x, 2 * N, ss).second)
        printf("NO\n");
      else
        printf("YES\n");
    }
  }
  return 0;
}
