int get_neighbours_number(int i,int j){
    int cmp=0;
    if(i > 0){
        if(matrix[i-1][j] == 1) { cmp++; }
        if(j > 0)
            if(matrix[i-1][j-1] == 1) { cmp++; }
        if(j < MAX_LENGTH-1)
            if(matrix[i-1][j+1] == 1) { cmp++; }
    }
    if(i < MAX_HEIGHT-1){
        if(matrix[i+1][j] == 1) { cmp++; }
        if(j > 0)
            if(matrix[i+1][j-1] == 1) { cmp++; }
        if(j < MAX_LENGTH-1)
            if(matrix[i+1][j+1] == 1) { cmp++; }
    }
    if(j > 0)
        if(matrix[i][j-1] == 1) { cmp++; }
    if(j < MAX_LENGTH-1)
        if(matrix[i][j+1] == 1) { cmp++; }

    return cmp;
}