3 3 20
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2 2
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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
5 5
6 4
5 3
6 4
 3 3 20
1 1
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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
6 6
4 6
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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
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 3 1 20
3 1
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4 2
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6 2
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2 2
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4 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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1 1
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 1 10 10
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8 4
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7 17
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2 6
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16 4
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 1 10 10
2 4
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1 17
1 9
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2 10
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 10 10 10
9 17
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8 10
12 2
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18 6
10 6
13 19
2 12
10 8
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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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3 15
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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;
inline int read() {
  char c = getchar();
  int x = 0;
  bool f = 0;
  for (; !isdigit(c); c = getchar()) f ^= !(c ^ 45);
  for (; isdigit(c); c = getchar()) x = (x << 1) + (x << 3) + (c ^ 48);
  if (f) x = -x;
  return x;
}
int n, m, Q;
int mx[1000005 << 2], mn[1000005 << 2];
set<int> rs[1000005 << 2], ls[1000005 << 2], mp[1000005];
bool ok[1000005 << 2];
inline void pushup(int p) {
  mx[p] = max(mx[p << 1], mx[p << 1 | 1]);
  mn[p] = min(mn[p << 1], mn[p << 1 | 1]);
  ok[p] = ok[p << 1] & ok[p << 1 | 1] & (mx[p << 1 | 1] < mn[p << 1]);
}
void modify(int p, int l, int r, int x) {
  if (l == r) {
    mx[p] = rs[l].empty() ? 0 : *rs[l].rbegin();
    mn[p] = ls[l].empty() ? m + 1 : *ls[l].begin();
    ok[p] = (mx[p] < mn[p]);
    return;
  }
  int mid = l + r >> 1;
  x <= mid ? modify(p << 1, l, mid, x) : modify(p << 1 | 1, mid + 1, r, x);
  pushup(p);
}
int main() {
  n = read(), m = read(), Q = read();
  memset(ok, 1, sizeof ok);
  for (register int i = (1); i <= (4 * n); ++i) mx[i] = 0, mn[i] = m + 1;
  while (Q--) {
    int x = read() + 1, y = read() + 1;
    if (mp[x].count(y)) {
      mp[x].erase(y);
      if (y & 1)
        rs[x >> 1].erase(y >> 1);
      else
        ls[x >> 1].erase(y >> 1);
    } else {
      mp[x].insert(y);
      if (y & 1)
        rs[x >> 1].insert(y >> 1);
      else
        ls[x >> 1].insert(y >> 1);
    }
    modify(1, 1, n, x >> 1);
    puts(ok[1] ? "YES" : "NO");
  }
  return 0;
}
