3 3 20
4 4
2 4
2 2
2 2
2 2
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2 2
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
3 1
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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
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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
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 1 10 10
1 15
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2 16
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8 8
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8 4
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7 17
6 6
1 1
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1 3
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2 6
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12 8
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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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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
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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
6 6
7 17
4 16
11 9
2 6
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11 13
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3 15
 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;
const int MAXN = 200005;
set<int> ab[MAXN][2];
int N, M, Q;
struct segTree {
  int f, t, mini, maxi;
  bool ans;
  segTree *L, *R;
  segTree(int _f, int _t) : f(_f), t(_t) {
    ans = false;
    mini = INT_MAX;
    maxi = INT_MIN;
    if (f != t) {
      L = new segTree(f, (f + t) / 2);
      R = new segTree((f + t) / 2 + 1, t);
    }
  }
  void update(int x, int v, bool flag) {
    if (f == t && t == x) {
      if (flag)
        maxi = v;
      else
        mini = v;
      ans = maxi >= mini;
      return;
    }
    if (x < R->f)
      L->update(x, v, flag);
    else
      R->update(x, v, flag);
    mini = min(R->mini, L->mini);
    maxi = max(R->maxi, L->maxi);
    ans = R->ans | L->ans | (R->maxi >= L->mini);
  }
};
int main() {
  scanf("%d %d %d", &N, &M, &Q);
  segTree *tree = new segTree(0, N + 1);
  for (int i = 0; i < Q; i++) {
    int x, y;
    scanf("%d %d", &x, &y);
    x--, y--;
    bool flag = (x & 1);
    int mult = (flag ? -1 : 1);
    if (ab[x / 2][flag].count((y / 2) * mult))
      ab[x / 2][flag].erase((y / 2) * mult);
    else
      ab[x / 2][flag].insert((y / 2) * mult);
    int val = INT_MAX;
    if (flag) val = INT_MIN;
    if (ab[x / 2][flag].size() > 0) val = abs(*ab[x / 2][flag].begin());
    tree->update(x / 2, val, flag);
    puts((!tree->ans ? "YES" : "NO"));
  }
  return 0;
}
