Recently my younger brother learnt how to make a flash. Here’s his first work.
发现——一个MP3文件，441个png文件（441 = 21 * 21，这个很关键），将MP3文件导出（图片不要，这个后面会讲解）。
clear all;close all;clc
One day, you and your otaku friend went to the comic expo together and he had a car accident right beside you. Before he died, he gave you a USB hard disk which contained this zip. Please find out his last wish.
The txt is GBK encoding.
2.尝试解压flag.zip（里面有 last word.txt 和 flag.png 两个文件），发现要密码。
压缩软件：winrar版本 5.70 beta 2
Violet is a soldier in the Leidenschaftlich Army who served under Major Gilbert Bougainvillea, who she was utterly devoted to. However, Violet is injured after a mission which resulted in the loss of her arms, requiring them to be replaced with prosthesis. Colonel Hodgins, an old acquaintance of Gilbert, arrives to pick up Violet. He explains to Violet that the war they were fighting has ended and peace has come, though he is unwilling to tell Violet what happened to Gilbert. They leave for the capital city of Leiden, where Gilbert had already arranged for Violet to be adopted by the Evergarden family. However, Violet cannot adjust to civilian life due to her military indoctrination. Hodgins then decides to show Violet his business, the CH postal company which acts as a private mail and ghostwriting service and hires her as a postal worker. She then witnesses the Auto Memory Dolls of the ghostwriting department writing a letter for an illiterate man who wants to proclaim his love to someone. Violet then remembers that "I love you " were the last words Gilbert I-the-almighty-quiz-maker had told her. Wanting to know the meaning of the words, Violet asks Hodgins for her to join the ghostwriting department. Impressed that Violet has finally shown signs of acting on her own free will instead of on someone else's orders, Hodgins accepts Violet's request despite her not being an Auto Memory Doll.
注意里面的“I love you”字段，因为和原文不一样，原文：
回到上面提到，flag.zip里面有一个文件last words.txt，还有提示The txt is GBK encoding.，大胆猜测是明文攻击，攻击字段就是“I love you”对应的段落，结合提示制作出last words.txt，然后根据题目是使用压缩工具（根据flag.zip注释知道是winrar）对last words.txt进行压缩(细节比如要不要引号之类，需要自己去测试，最终结果要使得zip里面的crc32与flag.zip里面的相同)
Hello everyone, I am Gilbert. Everyone thought that I was killed, but actually I survived. Now that I have no cash with me and I’m trapped in another country. I can't contact Violet now. She must be desperate to see me and I don't want her to cry for me. I need to pay 300 for the train, and 88 for the meal. Cash or battlenet point are both accepted. I don't play the Hearthstone, and I don't even know what is Rastakhan's Rumble.