算法分析与设计，贪心算法解决活动安排问题，从data.txt文件中读取所要安排的活动的数量和活动的开始和介绍时间，输出选择的活动，在安排活动的过程中不移动活动的顺序。-Number of algorithm analysis and design, greedy algorithm for solving activities arrangements, from the the data.txt file read to arrange activities and the activitie