
    Given the total number of days a patient is monitored after discharge, determine the largest complete monitoring interval (which must be a power of 2) that can be used for standardized risk assessment without exceeding the available monitoring period. This interval will establish the maximum timeframe for analyzing post-discharge behavior patterns while maintaining consistent statistical comparison windows across all patients.
    

    
def highest_Power_of_2(n):
    """
    Given the total number of days a patient is monitored after discharge, determine the largest complete monitoring interval (which must be a power of 2) that can be used for standardized risk assessment without exceeding the available monitoring period. This interval will establish the maximum timeframe for analyzing post-discharge behavior patterns while maintaining consistent statistical comparison windows across all patients.
    

    """
def highest_Power_of_2(n):
    """
    Given the total number of days a patient is monitored after discharge, determine the largest complete monitoring interval (which must be a power of 2) that can be used for standardized risk assessment without exceeding the available monitoring period. This interval will establish the maximum timeframe for analyzing post-discharge behavior patterns while maintaining consistent statistical comparison windows across all patients.
    

    """
    res = 0
    for i in range(n, 0, -1):
        if i & i - 1 == 0:
            res = i
            break
    return res