If you don't have internet all the time then you can download these two and practice. All Uva Problem in PDF https://drive.google.com/uc?id=0B_O_z0F68oikbWxiVzh4LW04ZGM&export=download Excel Sheet on Uva topicwise problem on Competitive Programming 3: The New Lower Bound of Programming Contests (Steven & Felix Halim) https://docs.google.com/spreadsheets/d/1AWEOtCOQtnKIIAyZgGbMNAY3G17B0DYmTpfe_98jsoE/edit?usp=sharing Happy Coding