activity_selection.py

# flake8: noqa

"""The following implementation assumes that the activities
are already sorted according to their finish time"""

"""Prints a maximum set of activities that can be done by a
single person, one at a time"""
# n --> Total number of activities
# start[]--> An array that contains start time of all activities
# finish[] --> An array that contains finish time of all activities


def printMaxActivities(start, finish):
    """
    >>> start = [1, 3, 0, 5, 8, 5]
    >>> finish = [2, 4, 6, 7, 9, 9]
    >>> printMaxActivities(start, finish)
    The following activities are selected:
    0 1 3 4 
    """
    n = len(finish)
    print("The following activities are selected:")

    # The first activity is always selected
    i = 0
    print(i, end=" ")

    # Consider rest of the activities
    for j in range(n):

        # If this activity has start time greater than
        # or equal to the finish time of previously
        # selected activity, then select it
        if start[j] >= finish[i]:
            print(j, end=" ")
            i = j


# Driver program to test above function
start = [1, 3, 0, 5, 8, 5]
finish = [2, 4, 6, 7, 9, 9]
printMaxActivities(start, finish)

"""
The following activities are selected:
0 1 3 4
"""