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1 19
2 12
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2 16
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1 9
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2 14
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14 14
10 10
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6 10
7 17
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 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
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6 6
6 6
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6 4
6 6
6 6
5 3
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6 2
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6 6
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5 3
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 1 1 100
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1 7
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2 6
2 8
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1 13

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#include <bits/stdc++.h>
const int bufSize = 1e6;
using namespace std;
inline char nc() {
  static char buf[bufSize], *p1 = buf, *p2 = buf;
  return p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, bufSize, stdin), p1 == p2)
             ? EOF
             : *p1++;
}
template <typename T>
inline T read(T &r) {
  static char c;
  static int flag;
  flag = 1, r = 0;
  for (c = nc(); !isdigit(c); c = nc())
    if (c == '-') flag = -1;
  for (; isdigit(c); c = nc()) r = r * 10 + c - 48;
  return r *= flag;
}
const int maxn = 2e5 + 100;
int n, m, q;
int minr[maxn << 2], maxl[maxn << 2];
bool cant[maxn << 2];
set<int> LS[maxn], RS[maxn];
void build(int l, int r, int p) {
  minr[p] = 1 << 30, maxl[p] = 0;
  if (l == r) return;
  int mid = (l + r) >> 1;
  build(l, mid, p << 1), build(mid + 1, r, p << 1 | 1);
}
inline void pushup(int p) {
  cant[p] =
      cant[p << 1] | cant[p << 1 | 1] | (minr[p << 1] <= maxl[p << 1 | 1]);
  minr[p] = min(minr[p << 1], minr[p << 1 | 1]);
  maxl[p] = max(maxl[p << 1], maxl[p << 1 | 1]);
}
void update(int l, int r, int p, int pos) {
  if (l == r) {
    minr[p] = RS[l].size() ? *RS[l].begin() : 1 << 30;
    maxl[p] = LS[l].size() ? *--LS[l].end() : 0;
    cant[p] = minr[p] <= maxl[p];
    return;
  }
  int mid = (l + r) >> 1;
  if (pos <= mid)
    update(l, mid, p << 1, pos);
  else
    update(mid + 1, r, p << 1 | 1, pos);
  pushup(p);
}
int main() {
  read(n), read(m), read(q);
  build(1, n, 1);
  for (int i = 1, x, y; i <= q; ++i) {
    read(x), read(y);
    int gx = (x + 1) >> 1, gy = (y + 1) >> 1;
    if (x & 1) {
      set<int>::iterator it = RS[gx].find(gy);
      if (it == RS[gx].end())
        RS[gx].insert(gy);
      else
        RS[gx].erase(it);
    } else {
      set<int>::iterator it = LS[gx].find(gy);
      if (it == LS[gx].end())
        LS[gx].insert(gy);
      else
        LS[gx].erase(it);
    }
    update(1, n, 1, gx);
    puts(cant[1] ? "NO" : "YES");
  }
  return 0;
}
