Cheater 1: Ali.P Cheater 2: Ali.Pi Although their names are same in their profiles, but they copied all three of the codes from each other which is WRONG. In problem A, the difference in their code was only a single line comment. In problem B, the difference in their code was of a 6 line comment. In problem C, the difference in their code was only a single line comment. Also, the time difference between their submissions is very less. Difference between their ranks was 1. How come codeforces did not detect plagiarism? Check rank number 301 and 302 in Standings of the round