3 3 20
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5 5
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5 5
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2 2
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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
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6 4
5 3
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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
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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
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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
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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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2 16
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8 4
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7 17
6 6
1 1
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2 6
1 1
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2 6
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12 8
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2 6
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1 19
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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
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11 9
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4 6
10 2
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3 15
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11 9
2 6
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2 2
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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>
#pragma GCC optimize("O3")
#pragma GCC target("sse4")
using namespace std;
constexpr int INF = 1e9 + 9;
int n, m, q;
struct SegTree {
  int n, H;
  vector<int> mn, mx, failed;
  vector<set<int>> rows;
  SegTree(int n)
      : n(n), rows(n), failed(n * 4), mn(n * 4, INF), mx(n * 4, -INF) {
    H = 1;
    while (H < n) {
      H *= 2;
    }
  }
  void updateRange(int p, int lo, int hi, int x) {
    if (lo >= hi) {
      mn[p] = INF;
      mx[p] = -INF;
      if (!rows[x].empty()) {
        if (x % 2 == 0) {
          mn[p] = *rows[x].begin();
        } else {
          mx[p] = *rows[x].rbegin();
        }
      }
    } else {
      int m = lo + (hi - lo) / 2;
      if (x <= m) {
        updateRange(p * 2, lo, m, x);
      } else {
        updateRange(p * 2 + 1, m + 1, hi, x);
      }
      mn[p] = min(mn[p * 2], mn[p * 2 + 1]);
      mx[p] = max(mx[p * 2], mx[p * 2 + 1]);
      failed[p] =
          failed[p * 2] || failed[p * 2 + 1] || mn[p * 2] < mx[p * 2 + 1];
    }
  }
  void updateRange2(int x) {
    int i = H + x;
    mn[i] = INF;
    mx[i] = -INF;
    if (!rows[x].empty()) {
      if (x % 2 == 0) {
        mn[i] = *rows[x].begin();
      } else {
        mx[i] = *rows[x].rbegin();
      }
    }
    for (int p = i / 2; p >= 1; p /= 2) {
      mn[p] = min(mn[p * 2], mn[p * 2 + 1]);
      mx[p] = max(mx[p * 2], mx[p * 2 + 1]);
      failed[p] =
          failed[p * 2] || failed[p * 2 + 1] || mn[p * 2] < mx[p * 2 + 1];
    }
  }
  void update(int i, int j) {
    if (rows[i].count(j)) {
      rows[i].erase(j);
    } else {
      rows[i].insert(j);
    }
    updateRange2(i);
  }
};
void solve(int test, istream& in, ostream& out) {
  in >> n >> m >> q;
  SegTree st(2 * n);
  for (int _ = 0; _ < q; ++_) {
    int i, j;
    in >> i >> j;
    i--;
    j--;
    st.update(i, j);
    out << (st.failed[1] ? "NO" : "YES") << endl;
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  istream& in(std::cin);
  ostream& out(std::cout);
  solve(1, in, out);
  return 0;
}
