编写程序，提示用户输入一个mp3歌曲文件的文件名（可以带有路径），通过代码将该歌曲中的歌手名修改为自己的学号和姓名，并通过音乐播放器进行播放验证。-change music

The s-bot is a small (15 cm) differential wheeled (with additional tracks) mobile robot developed at the LIS (Laboratory of Intelligent Systems[1]) at the EPFL in Lausanne, Switzerland between 2001 and 2004. Targeted to swarm robotics, a field of art

一根长度为L厘米的木棍上有n只蚂蚁，每只蚂蚁要么朝左爬，要么朝右爬，速度为1厘米/秒。当两只蚂蚁相撞时，二者同时掉头（掉头时间忽略不计）。给出每只蚂蚁的初始位置和朝向，计算T秒之后每只蚂蚁的位置。 -A length of n ants on L cm stick, each ant crawling either the left or to the right to climb rate of 1 cm/sec. When two ants collide, both at the sa