3 3 20
4 4
2 4
2 2
2 2
2 2
5 5
2 2
2 2
2 2
5 5
5 5
3 5
4 2
2 2
5 5
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
3 1
6 6
1 1
4 6
3 1
3 3
6 4
3 1
6 6
4 6
3 1
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
19 15
 3 1 20
3 1
1 1
3 1
4 2
4 2
6 2
1 1
5 1
5 1
2 2
4 2
2 2
6 2
4 2
4 2
2 2
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
16 4
16 2
 1 1 100
2 2
2 2
1 1
2 2
2 2
1 1
1 1
1 1
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2 2
2 2
1 1
1 1
1 1
1 1
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2 2
1 1
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1 1
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1 1
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2 2
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2 2
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2 2
2 2
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1 1
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2 2
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2 2
2 2
1 1
1 1
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2 2
2 2
1 1
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2 2
1 1
1 1
2 2
 1 10 10
1 15
1 19
2 16
1 17
2 4
2 2
2 8
1 11
2 10
2 6
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10 2
19 9
19 17
8 8
5 3
20 4
12 12
2 16
5 19
2 4
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2 4
2 4
1 3
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3 3
2 4
3 3
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3 3
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1 3
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2 4
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1 1
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 1 10 10
1 19
1 17
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1 15
2 8
2 6
2 16
2 14
2 4
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8 4
2 4
9 19
16 2
13 7
11 7
7 17
6 6
1 1
15 15
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2 2
1 1
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1 1
2 4
1 1
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1 5
2 6
1 1
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1 3
2 6
1 5
2 6
2 2
2 6
1 1
2 4
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1 1
2 6
1 5
2 4
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2 6
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2 6
2 4
2 2
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2 6
2 4
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2 6
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2 16
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2 18
2 12
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1 1
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1 1
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1 1
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1 1
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1 1
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 3 3 20
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 10 10 10
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6 6
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11 9
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8 2
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3 1
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1 11
2 8
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1 9
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1 7
1 15
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 10 10 10
15 19
12 8
7 13
12 2
8 10
3 5
13 13
9 9
18 2
5 13
 2 3 20
1 3
1 1
1 1
1 3
2 4
2 4
1 1
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1 1
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3 1
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1 1
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1 1
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1 3
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2 6
1 5
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1 1
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4 6
1 5
1 1
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1 3
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6 2
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4 6
4 4
3 1
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1 1
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 10 10 10
10 6
7 5
9 13
13 15
19 7
11 13
5 17
16 6
2 14
7 15
 1 1 20
1 1
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2 4
2 8
1 19
2 2
2 10
1 5
2 6
1 17
2 14
1 15
 3 3 20
4 2
3 5
3 1
2 2
3 1
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6 2
6 4
1 5
2 6
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3 1
5 3
3 3
2 6
3 3
2 6
3 3
4 2
1 5
 10 10 10
1 19
3 17
12 4
16 20
5 19
5 17
20 2
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
1 13
 10 10 10
9 17
9 13
8 10
12 2
18 14
18 6
10 6
13 19
2 12
10 8
 10 10 10
2 6
5 9
5 15
1 19
6 6
8 4
11 9
13 11
4 6
10 2
 10 10 10
16 2
12 6
8 2
12 2
3 15
6 6
7 17
4 16
11 9
2 6
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18 2
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9 19
6 10
20 18
15 19
2 2
11 13
17 13
3 15
 1 2 1
2 2
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2 4
1 13
1 7
2 14
1 19
1 17
2 2
1 15
1 11
2 6
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1 13
2 4
1 5
2 2
1 19
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;
enum { N = 400007 };
int n, m, q, f;
map<int, int> H[N];
vector<int> X[N << 2], Y[N << 2], P[N], Q[N];
void upd(int u, int k) {
  for (; u; u &= u - 1) P[u].push_back(max(P[u].back(), k));
}
int pry(int u) {
  int r = 0;
  for (; u <= n; u += u & -u) r = max(r, P[u].back());
  return r;
}
void dpu(int u) {
  for (; u; u &= u - 1) P[u].pop_back();
}
void uqd(int u, int k) {
  for (; u <= n; u += u & -u) Q[u].push_back(min(Q[u].back(), k));
}
void dqu(int u) {
  for (; u <= n; u += u & -u) Q[u].pop_back();
}
int qry(int u) {
  int r = m + 1;
  for (; u; u &= u - 1) r = min(r, Q[u].back());
  return r;
}
void UPD(int l, int r, int x, int y, int u = 1, int L = 1, int R = q) {
  if (l == L && r == R) {
    X[u].push_back(x);
    Y[u].push_back(y);
    return;
  }
  int m = (L + R) >> 1;
  if (r <= m)
    UPD(l, r, x, y, u << 1, L, m);
  else if (l > m)
    UPD(l, r, x, y, u << 1 | 1, m + 1, R);
  else
    UPD(l, m, x, y, u << 1, L, m), UPD(m + 1, r, x, y, u << 1 | 1, m + 1, R);
}
void FLY(int u = 1, int L = 1, int R = q, int f = 0) {
  int go = 0;
  if (!f) go = 1;
  if (go) {
    int s = X[u].size();
    for (int i = 0; i <= s - 1; ++i) {
      int x = X[u][i], y = Y[u][i], o = (x & 1);
      x = (x + 1) / 2, y = (y + 1) / 2;
      if (o) {
        if (pry(x) >= y) f = 1;
        uqd(x, y);
      } else {
        if (qry(x) <= y) f = 1;
        upd(x, y);
      }
    }
  }
  if (L == R) {
    puts(f ? "NO" : "YES");
  } else {
    int m = (L + R) >> 1;
    FLY(u << 1, L, m, f), FLY(u << 1 | 1, m + 1, R, f);
  }
  if (go) {
    int s = X[u].size();
    for (int i = s - 1; i >= 0; --i) {
      int x = X[u][i], y = Y[u][i], o = (x & 1);
      x = (x + 1) / 2, y = (y + 1) / 2;
      if (o) {
        dqu(x);
      } else {
        dpu(x);
      }
    }
  }
}
int main() {
  scanf("%d%d%d", &n, &m, &q);
  for (int i = 1; i <= n; ++i) Q[i].push_back(m + 1), P[i].push_back(0);
  for (int i = 1; i <= q; ++i) {
    int x, y;
    scanf("%d%d", &x, &y);
    if (H[x][y]) {
      UPD(H[x][y], i - 1, x, y);
      H[x][y] = 0;
    } else
      H[x][y] = i;
  }
  for (int i = 1; i <= 2 * n; ++i)
    for (map<int, int>::iterator j = H[i].begin(); j != H[i].end(); ++j)
      if (j->second) UPD(j->second, q, i, j->first);
  FLY();
  return 0;
}
