#pragma region Template
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cstdlib>
#include <queue>
#include <vector>
#include <map>
#include <cmath>
#include <string>
#include <cstring>
#include <utility>
#include <stack>
#include <set>
#include <algorithm>
#include <bitset>
#include <functional>
#include <ctime>
#include <cassert>
#include <valarray>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <complex>
#include <regex>
#pragma comment(linker, "/STACK:167772160")

using namespace std;
#define mp make_pair
#ifdef LOCAL
#define eprintf(...) fprintf(stderr, __VA_ARGS__)
#define print_var(x) cerr << #x << " : " << (x) << endl
#define print_array(arr, len) {cerr << #arr << " : "; for(int i = 0; i < len; ++i) cerr << arr[i] << ' '; cerr << endl;}
#define print_2d_array(arr, len1, len2) {cerr << #arr << endl; for(int i = 0; i < len1; ++i, cerr << endl) for(int j = 0; j < len2; ++j) cerr << arr[i][j] << ' ';}
#define print_iterable(i) {cerr << #i << " : "; for(auto e : i) cerr << e << ' '; cerr << endl;}
#define print_new_line() cerr << endl

template <typename T, typename Q>
void print_pair1(pair<T, Q> x)
{
	cerr << "(" << x.first << ", " << x.second << ")\n";
}

#define print_pair(x) {cerr << #x << " : "; print_pair1(x);}
#else
#define print_pair(x) (void)0
#define eprintf(...) (void)0
#define print_var(x) (void)0
#define print_array(arr, len) {}
#define print_2d_array(arr, len1, len2) {}
#define print_iterable(i) {}
#define print_new_line() (void)0
#endif

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef unsigned int uint;
typedef pair<int, int> pii;
typedef pair<ll, int> pli;
typedef pair<ll, ll> pll;

const int INF = (int)1e9 + 10;
const ll LINF = ll(2e18) + 10;
const double PI = acosl(-1);
const double eps = 1e-8;
const ld EPS = 1e-12;
#pragma endregion

#ifdef LOCAL
#define ERR_CATCH
//#define NOERR
#endif

const int N = 2e5 + 10;
int n;
int r, c;
int a[N], b[N];
pii p[N];
int st[N];
int ssz;

int scan_point()
{
	int x, y;
	scanf("%d%d", &x, &y);
	if ((x != 0 && x != r) && (y != 0 && y != c))
		return -1;
	if (x == 0)
		return y;
	if (y == c)
		return c + x;
	if (x == r)
		return r + 2 * c - y;
	return 2 * r + 2 * c - x;
}

void solve()
{
	scanf("%d%d%d", &r, &c, &n);
	for(int i = 0; i < n; ++i)
	{
		a[i] = scan_point();
		b[i] = scan_point();
		if (a[i] > b[i])
			swap(a[i], b[i]);
		if (a[i] == -1 || b[i] == -1)
		{
			--i;
			--n;
		}
	}
	for (int i = 0; i < n; ++i)
	{
		eprintf("%d, %d\n", a[i], b[i]);
		p[i] = {a[i], i + 1};
		p[i + n] = {b[i], - (i + 1)};
	}
	sort(p, p + 2 * n);
	for(int i = 0; i < 2 * n; ++i)
	{
		if (p[i].second > 0)
			st[ssz++] = p[i].second;
		else
		{
			if (ssz == 0 || -p[i].second != st[ssz - 1])
			{
				puts("NO");
				return;
			}
			--ssz;
		}
	}
	puts("YES");
}

int main()
{
#ifdef LOCAL
	freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
#ifdef NOERR
	freopen("err.txt", "w", stderr);
#endif
#else
	//freopen("sum.in", "r", stdin);
	//freopen("sum.out", "w", stdout);
#endif

#ifdef ERR_CATCH
	try
	{
#endif

#ifdef ST
		while (true)
			solve();
#endif
#ifdef CASES
#define MULTITEST
#endif
#ifdef MULTITEST
		int t;
		scanf("%d", &t);
		char endl1[5];
		fgets(endl1, 5, stdin);
		for (int i = 0; i < t; ++i)
		{
#ifdef CASES
			printf("Case #%d: ", i + 1);
#endif
			solve();
#ifdef CASES
			eprintf("Passed case #%d:\n", i + 1);
#endif
		}
#else
		solve();
#endif

#ifdef ERR_CATCH
	}
	catch (logic_error e)
	{
		print_var(e.what());
		puts("___________________________________________________________________________");
		exit(0);
	}
#endif
#ifdef LOCAL
	eprintf("\n\nTime: %.3lf\n", double(clock()) / CLOCKS_PER_SEC);
#endif
}

Measured memory_bytes: 2816