F

   #include <iostream>
    #include <vector>

    using namespace std;

    struct Point{
            unsigned long long xx;
            unsigned long long yy;
    };


    int main(){
            std::ios::sync_with_stdio(false);
            unsigned long long W, H, N;
            cin >> W >> H >> N;
            unsigned long long size = W * H;
            if (size > N * 5){
                cout << "No" << endl;
                return 0;
            }

            unsigned long long pointsCount = 0;
            vector<vector<unsigned long>> polotno(W);
            for (unsigned long i = 0; i < W; i++){
                polotno[i].assign(H, 0);
            }

            for (unsigned long i = 0; i < N; i++){
                if ((N - i + 1) * 5 < (size - pointsCount + 1)){
                    cout << "No";
                    return 0;
                }
                    long long x, y;
                    cin >> x >> y;
                    x--;
                    y--;
                    vector<Point> points;
                    Point p;
                    if ((x >= 0) && (x < W) && (y >= 0) && (y < H)){
                            p.xx = x;
                            p.yy = y;
                            points.push_back(p);
                    }

                    if ((x - 1 >= 0) && (x - 1 < W) && (y >= 0) && (y < H)){
                            p.xx = x - 1;
                            p.yy = y;
                            points.push_back(p);
                    }

                    if ((x >= 0) && (x < W) && (y - 1 >= 0) && (y - 1 < H)){
                            p.xx = x;
                            p.yy = y - 1;
                            points.push_back(p);
                    }

                    if ((x + 1 >= 0) && (x + 1 < W) && (y >= 0) && (y < H)){
                        p.xx = x + 1;
                        p.yy = y;
                        points.push_back(p);
                    }

                    if ((x >= 0) && (x < W) && (y + 1 >= 0) && (y + 1 < H)){
                        p.xx = x;
                        p.yy = y + 1;
                        points.push_back(p);
                    }

                    for (auto& element : points) {
                        if (polotno[element.xx][element.yy] == 0) { //так как считаем с 0 массив, а клетки с 1
                            polotno[element.xx][element.yy] = 1;
                            pointsCount++;
                        }
                    }
            }

        if (pointsCount == size){
            cout << "Yes" << endl;
        } else {
            cout << "No" << endl;
        }
        return 0;
    }