#include <iostream>
#include <vector>

int main(){

    short int N;
    short int M;

    std::cin >> N;
    std::cin >> M;

    N = N - 1;

    std::vector<std::vector<int> >Soldiers(N,std::vector<int>(M));
    for(int a = 0; a < N;a++){
        for(int b = 0; b < M;b++){
            std::cin >> Soldiers[a][b];
        }
    }


    int Exceptions = 0;

    for(int a = 0; a < N;a++){
        for(int b = 0;b < M;b++){
            if(a == 0 && b == 0 || a == N-1 && b == 0 || a == 0 && b == M-1 || a == N-1 && b == M-1){
                int MinCounter = 0;
                int MaxCounter = 0;
                int c;
                int d;
                if(a == 0){
                    for(c = 0;c < a+2;c++){
                        for(d = b - 1;d < b+2;d++){
                            if(Soldiers[a][b] > Soldiers[c][d]){
                                MaxCounter++;
                            }else if(Soldiers[a][b] < Soldiers[c][d]){
                                MinCounter++;
                            }
                        }
                    }
                    if(MaxCounter == 5 || MinCounter == 5){
                        Exceptions++;
                    }
                }else if(a == N-1){
                    for(c = a-1;c <= a;c++){
                        for(d = b-1; d < b + 2;d++){
                            if(Soldiers[a][b] > Soldiers[c][d]){
                                MaxCounter++;
                            }else if(Soldiers[a][b] < Soldiers[c][d]){
                                MinCounter++;
                            }
                        }
                    }
                    if(MaxCounter == 5 || MinCounter == 5){
                        Exceptions++;
                    }
                }else if(b == 0){
                    for(c = a - 1; c < a + 2;c++){
                        for(d = 0; d < 2;d++){
                            if(Soldiers[a][b] > Soldiers[c][d]){
                                MaxCounter++;
                            }else if(Soldiers[a][b] < Soldiers[c][d]){
                                MinCounter++;
                            }
                        }
                    }
                    if(MaxCounter == 5 || MinCounter == 5){
                        Exceptions++;
                    }
                }else if(b == M-1){
                    for(c = a-1;c < a+2;c++){
                        for(d = M-1;d <= M;d++){
                            if(Soldiers[a][b] > Soldiers[c][d]){
                                MaxCounter++;
                            }else if(Soldiers[a][b] < Soldiers[c][d]){
                                MinCounter++;
                            }
                        }
                    }
                    if(MaxCounter == 5 || MinCounter == 5){
                        Exceptions++;
                    }
                }else{
                    for(c = a - 1;c < a + 2;c++){
                        for(d = b - 1;d < b + 2;d++){
                            if(Soldiers[a][b] > Soldiers[c][d]){
                                MaxCounter++;
                            }else if(Soldiers[a][b] < Soldiers[c][d]){
                                MinCounter++;
                            }
                        }
                    }
                    if(MaxCounter == 8 || MinCounter == 8){
                        Exceptions++;
                    }
                }
            }
        }
    }

    std::cout << Exceptions;

    return 0;
}