Working dataset: https://www.kaggle.com/datasets/bwandowando/ukraine-russian-crisis-twitter-dataset-1-2-m-rows The task is to implement from scratch a system ranking tweet users, considering the relation R = {(u, v) | user u has mentioned user v in a tweet} and computing, e.g., the PageRank index. https://malchiodi.di.unimi.it/teaching/AMD/2022-23