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 1 1 100
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1 17
1 9
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10 6
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2 12
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1 19
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11 9
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4 6
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1 15
1 17
1 7
2 14
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1 17
2 4
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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;
template <class T>
bool ckmin(T& a, const T& b) {
  return b < a ? a = b, 1 : 0;
}
template <class T>
bool ckmax(T& a, const T& b) {
  return a < b ? a = b, 1 : 0;
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MOD = 1000000007;
const char nl = '\n';
const int MX = 100001;
const long long SZ = 262144;
struct node {
  long long O, E;
  bool F;
  node() {
    O = 1000000;
    E = -1;
    F = false;
  }
  node(long long X, long long Y) {
    O = X;
    E = Y;
    F = false;
  }
};
node seg[2 * SZ];
node combine(node A, node B) {
  node res;
  res.O = min(A.O, B.O);
  res.E = max(A.E, B.E);
  res.F = A.O <= B.E || A.F || B.F;
  return res;
}
void update(int p, pair<long long, long long> value) {
  p += SZ;
  seg[p].O = value.first;
  seg[p].E = value.second;
  seg[p].F = value.first <= value.second;
  for (; p > 1; p >>= 1) seg[p >> 1] = combine(seg[(p | 1) ^ 1], seg[p | 1]);
}
bool query(int l, int r) {
  node resL, resR;
  r++;
  for (l += SZ, r += SZ; l < r; l >>= 1, r >>= 1) {
    if (l & 1) resL = combine(resL, seg[l++]);
    if (r & 1) resR = combine(seg[--r], resR);
  }
  return combine(resL, resR).F;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int N, M, Q;
  cin >> N >> M >> Q;
  set<int> odd[N], even[N];
  for (int i = 0; i < (N); i++) {
    odd[i].insert(1000000);
    even[i].insert(-1);
  }
  while (Q--) {
    int X, Y;
    cin >> X >> Y;
    X--;
    Y--;
    if (X % 2 == 0) {
      if (odd[X / 2].count(Y)) {
        odd[X / 2].erase(Y);
      } else
        odd[X / 2].insert(Y);
    } else {
      if (even[X / 2].count(Y)) {
        even[X / 2].erase(Y);
      } else {
        even[X / 2].insert(Y);
      }
    }
    pair<long long, long long> cur = {*odd[X / 2].begin(),
                                      *even[X / 2].rbegin()};
    update(X / 2, cur);
    if (!query(0, N - 1)) {
      cout << "YES" << nl;
    } else {
      cout << "NO" << nl;
    }
  }
  return 0;
}
