
    Given a set of n vital sign parameters from a patient monitoring system, determine the number of different ways these parameters can be grouped into distinct alert patterns for identifying potential medical complications. Each vital sign parameter must be included in exactly one group, and any number of groups can be formed to create a valid alert pattern.
    

    
def bell_number(n):
    """
    Given a set of n vital sign parameters from a patient monitoring system, determine the number of different ways these parameters can be grouped into distinct alert patterns for identifying potential medical complications. Each vital sign parameter must be included in exactly one group, and any number of groups can be formed to create a valid alert pattern.
    

    """
def bell_number(n):
    """
    Given a set of n vital sign parameters from a patient monitoring system, determine the number of different ways these parameters can be grouped into distinct alert patterns for identifying potential medical complications. Each vital sign parameter must be included in exactly one group, and any number of groups can be formed to create a valid alert pattern.
    

    """
    bell = [[0 for i in range(n + 1)] for j in range(n + 1)]
    bell[0][0] = 1
    for i in range(1, n + 1):
        bell[i][0] = bell[i - 1][i - 1]
        for j in range(1, i + 1):
            bell[i][j] = bell[i - 1][j - 1] + bell[i][j - 1]
    return bell[n][0]