3 3 20
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2 2
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5 5
3 5
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5 5
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 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
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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
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 3 1 20
3 1
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4 2
4 2
6 2
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5 1
5 1
2 2
4 2
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2 2
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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
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2 2
2 2
1 1
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 1 10 10
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12 8
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 2 3 20
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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3 17
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5 19
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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
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
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2 6
5 9
5 15
1 19
6 6
8 4
11 9
13 11
4 6
10 2
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16 2
12 6
8 2
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3 15
6 6
7 17
4 16
11 9
2 6
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9 19
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20 18
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2 2
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3 15
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1 7
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1 19
1 17
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1 11
2 6
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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;
auto IntLimits = numeric_limits<int>();
set<int> SL[200233], SR[200233];
struct Node {
  int mml, mmr;
  bool valid;
} Tree[200233 << 2];
Node merge(const Node &a, const Node &b) {
  Node ret;
  ret.mml = min(a.mml, b.mml);
  ret.mmr = max(a.mmr, b.mmr);
  ret.valid = a.valid && b.valid && a.mml > b.mmr;
  return ret;
}
void Build(int u, int l, int r) {
  Tree[u].mml = IntLimits.max(), Tree[u].mmr = IntLimits.min(),
  Tree[u].valid = true;
  if (l == r) return;
  int m = (l + r) >> 1;
  Build(u << 1, l, m);
  Build(u << 1 | 1, m + 1, r);
}
void Update(int u, int l, int r, int x) {
  Node &o = Tree[u];
  if (l == r) {
    if (!SL[x].empty())
      o.mml = *SL[x].begin();
    else
      o.mml = IntLimits.max();
    if (!SR[x].empty())
      o.mmr = *SR[x].rbegin();
    else
      o.mmr = IntLimits.min();
    o.valid = o.mml > o.mmr;
  } else {
    int m = (l + r) >> 1;
    if (x > m)
      Update(u << 1 | 1, m + 1, r, x);
    else
      Update(u << 1, l, m, x);
    o = merge(Tree[u << 1], Tree[u << 1 | 1]);
  }
}
int main() {
  int n, m, q, x, y;
  scanf("%d%d%d", &n, &m, &q);
  Build(1, 1, n);
  for (int i = 1; i <= q; ++i) {
    scanf("%d%d", &x, &y);
    int I = (x + 1) >> 1, J = (y + 1) >> 1;
    if (x & 1) {
      if (SL[I].count(J))
        SL[I].erase(J);
      else
        SL[I].insert(J);
    } else {
      if (SR[I].count(J))
        SR[I].erase(J);
      else
        SR[I].insert(J);
    }
    Update(1, 1, n, I);
    puts(Tree[1].valid ? "YES" : "NO");
  }
  return 0;
}
