#include<bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep1(i, n) for (int i = 1; i <= (int)(n); i++)
using namespace std;
int main() {
int w, h, k; cin >> w >> h >> k;
vector<int> x(k), y(k);
rep(i, k) cin >> x[i] >> y[i];
if (k == w * h) {
cout << "YES" << endl; return 0;
}
vector<vector<int>> board(h, vector<int> (w, 0));
rep(i, k) board[y[i]-1][x[i]-1] = 1;
int two = (1<<(w+1));
vector<vector<bool>> dp(h * w + 1, vector<bool> (two, 0));
int initial = 0;
rep(i, w) {
initial *= 2;
if (board[0][i]) initial++;
}
initial *= 2;
if (board[1][0]) initial++;
dp[0][initial] = 1;
rep(i, h-1) rep(j, w) {
bool new_unit = 0;
if (j+1 < w && board[i+1][j+1]) new_unit = 1;
if (j == w-1 && i < h-2 && board[i+2][0]) new_unit = 1;
rep(bi, two) if (dp[i*w+j][bi]) {
bitset<15> bit(bi);
// 何もしない
dp[i*w+j+1][bi*2%two+new_unit] = 1;
if (!bit.test(w)) {
// j 行に横並び2つを置く
if (j+1 < w && !bit.test(w-1)) {
if (!bit.test(0)) dp[i*w+j+1][bi*2%two+2+(1<<w)+new_unit] = 1;
if (!new_unit) dp[i*w+j+1][bi*2%two+1+(1<<w)] = 1;
}
if (j+1 < w && !bit.test(0) && !new_unit) {
dp[i*w+j+1][bi*2%two+3] = 1;
}
if (j > 0 && !bit.test(0) && !bit.test(1)) {
dp[i*w+j+1][bi*2%two+6+new_unit] = 1;
}
}
}
}
if (dp[(h-1) * w][two-2]) cout << "YES" << endl;
else cout << "NO" << endl;
}
