without out vectors .. using c++ ..Given a set of activities and the starting and finishing time of each activity, find the maximum number of activities that can be performed by a single person assuming that a person can only work on a single activity at a time. This problem is called the activity selection problem, which concerns the selection of non-conflicting activities to perform within a given time frame, given a set of activities each marked by a start and finish time. Input: 11 {1, 4}, {3, 5}, {0, 6}, {5, 7}, {3, 8}, {5, 9}, {6, 10}, {8, 11}, {8, 12}, {2, 13}, {12, 14} Output: 4 {1, 4}, {5, 7}, {8, 11}, {12, 14}

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Introduction to Greedy Algorithm

A greedy algorithm is a problem-solving method that makes the locally optimal selection at every stage to reach a globally optimal solution. It solves a problem in two stages: Scanning the list of items and Optimization. However, in most problems, the greedy algorithm fails to provide a globally optimal solution.