#include <iostream>
 
int i, j, k, A[1004004], B[1004004], N, M;
 
void print() {
	std::cout << "______A______" << '\n';
	for (int i=0; i<=N+1; i++) {
		for (int j=0; j<=M+1; j++)
			std::cout << A[i*(M+2)+j] << " ";
		std::cout << '\n';
	}
	std::cout << "______B______" << '\n';
	for (int i=0; i<=N+1; i++) {
		for (int j=0; j<=M+1; j++)
			std::cout << B[i*(M+2)+j] << " ";
		std::cout << '\n';
	}
	std::cout << '\n';
 
}
 
void F(int x, int y) {
    B[x*M+y] = 1;
    --k;
    if (A[(x-1)*(M+2)+y] == 4 && B[(x-1)*(M+2)+y] == 0) F(x-1, y);
    if (A[(x+1)*(M+2)+y] == 2 && B[(x+1)*(M+2)+y] == 0) F(x+1, y);
    if (A[x*(M+2)+y-1] == 1 && B[x*(M+2)+y-1] == 0) F(x, y-1);
    if (A[x*(M+2)+y+1] == 3 && B[x*(M+2)+y+1] == 0) F(x, y+1);
}
 
int main() {
    std::cin >> N >> M;
    k = N*M;
    for (i=0; i<1004004; ++i)
    	A[i] = B[i] = 0;
 
    print();
 
    for (i=1; i<=N; ++i) 
        for (j=1; j<=M; ++j)
            std::cin >> A[i*M+j];
 
    print();
 
    if (A[(M+2)+1] == 2 || A[(M+2)+1] == 3) F(1, 1);
 
    print();
 
    if (A[(M+2)+M] == 1 || A[(M+2)+M] == 2) F(1, M);
 
    print();
 
    if (A[N*(M+2)+M] == 1 || A[N*(M+2)+M] == 4) F(N, M);
 
    print();
 
    if (A[N*(M+2)+1] == 3 || A[N*(M+2)+1] == 4) F(N, 1);
 
    print();
 
    for (i=2; i<M; ++i)
        if (A[(M+2)+i] == 2) F(1, i);
    for (i=2; i<M; ++i)
        if (A[N*(M+2)+i] == 4) F(N, i);
    for (i=2; i<N; ++i)
        if (A[i*(M+2)+1] == 3) F(i, 1);
    for (i=2; i<N; ++i)
        if (A[i*(M+2)+M] == 1) F(i, M);
    std::cout << k;
    return 0;
}

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