2019 数学建模期中&期末
As one of the largest news and social networking website, Twitter is full of various news and information, real or fake. During the election, a fake news writer posts that Pope Francis supports Donald Trump. The news spread at an incredibly fast rate until 3 days later, a fact-checking website posts on Twitter saying that no proof shows that Pope Francis is related to Donald Trump. How long does it take to inform majority (90%) of Twitter users who have seen the fake news that it is actually a fake news?
CUMCM-2017-problem-B : “拍照赚钱”的任务定价