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#pragma GCC optimize("O3")
#pragma GCC target("sse,sse2,ssse3,sse4.1,sse4.2,avx,avx2")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;

#define all(x) begin(x), end(x)
#define sz(x) ((int) (x).size())
#define x first
#define y second
typedef long long ll;
typedef long double ld;

template<typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

template<typename T>
using normal_queue = priority_queue<T, vector<T>, greater<T>>;

const int MAX_N = 2e5 + 10, MAX_OBJECTS = 4e6, OBJECT_SIZE = 48;

struct { char _[OBJECT_SIZE]; } objects_pool[MAX_OBJECTS];
int free_objects[MAX_OBJECTS];
int free_objects_ptr = MAX_OBJECTS;

// int optimized = 0;

void* operator new(size_t sz) {
	if (sz == OBJECT_SIZE && free_objects_ptr) {
		// ++optimized;
		int ind = free_objects[free_objects_ptr - 1] + free_objects_ptr - 1;
		--free_objects_ptr;
		// cout << "allocated " << ind << endl;
		return objects_pool + ind;
	}
	void *ptr = malloc(sz);
	return ptr;
}

void operator delete(void* ptr) {
	if (ptr >= (void*) objects_pool && ptr < (void*) (objects_pool + MAX_OBJECTS)) {
		free_objects[free_objects_ptr++] = ((uint64_t) ptr - (uint64_t) objects_pool) / OBJECT_SIZE;
		free_objects[free_objects_ptr - 1] -= free_objects_ptr - 1;
		// cout << "returned " << free_objects[free_objects_ptr - 1] << endl;
		return;
	}
	free(ptr);
}

void operator delete(void*, size_t) { assert(0); }

set<pair<int, int>> cells;

int n, m, q;
int up[MAX_N], down[MAX_N];

ordered_set<pair<int, int>> treeUp[MAX_N], treeDown[MAX_N];

int countDown(int i, int x) {
	int res = 0;
	for (; i >= 0; i = (i & (i + 1)) - 1)
		res += (int) treeDown[i].order_of_key({x, -1});
	return res;
}

int countUp(int i, int x) {
	int res = 0;
	for (; i >= 0; i = (i & (i + 1)) - 1)
		res += (int) (treeUp[i].size() - treeUp[i].order_of_key({x + 1, -1}));
	return res;
}

void updValueUp(int i, int old, int nn) {
	int org = i;
	for (; i < n; i |= i + 1) {
		treeUp[i].erase({old, org});
		treeUp[i].insert({nn, org});
	}
}

void updValueDown(int i, int old, int nn) {
	int org = i;
	for (; i < n; i |= i + 1) {
		treeDown[i].erase({old, org});
		treeDown[i].insert({nn, org});
	}
}

signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n >> m >> q;
	fill(up, up + n, 0);
	fill(down, down + n, m);
	ll badCnt = 0;
	for (int query = 0; query < q; ++query) {
		int x, y;
		cin >> x >> y;
		--x, --y;
		y /= 2;
		int row = x / 2;
		int oup = up[row], odown = down[row];
		if (cells.count({x, y})) {
			cells.erase({x, y});
			if (x % 2 == 0) {
				auto it = cells.lower_bound({x, y});
				if (it != cells.end() && it->x == x)
					down[row] = it->y;
				else
					down[row] = m;
			} else {
				auto it = cells.lower_bound({x, y});
				if (it != cells.begin() && (--it)->x == x)
					up[row] = it->y + 1;
				else
					up[row] = 0;
			}
		} else {
			cells.insert({x, y});
			if (x % 2 == 0)
				down[row] = min(down[row], y);
			else
				up[row] = max(up[row], y + 1);
		}
		// bool ok = true;
		// int currn = m;
		// for (int i = 0; i < n && ok; ++i) {
		// 	currn = min(currn, down[i]);
		// 	if (currn < up[i])
		// 		ok = false;
		// }
		if (oup != up[row]) {
			badCnt -= countDown(row, oup);
			badCnt += countDown(row, up[row]);
			updValueUp(n - row - 1, oup, up[row]);
		}
		if (odown != down[row]) {
			badCnt -= countUp(n - row - 1, odown);
			badCnt += countUp(n - row - 1, down[row]);
			updValueDown(row, odown, down[row]);
		}
		// cout << badCnt << endl;
		cout << (badCnt ? "NO\n" : "YES\n");
		// for (int i = 0; i < n; ++i) {
		// 	cout << "(" << up[i] << "; " << down[i] << "] ";
		// }
		// cout << endl;
	}
	// cout << optimized << endl;
	return 0;
}