1. You can't do it starting with nothing.↵
2. Before you do it you have to at least know the following 2 things:↵
- the rating↵
- the first letter of there user name↵
↵
yes, knowing there rating is sometimes enough(you can find the most suspicious one and think it's him) but not always works that way. How to find all the user names with x rating: you can google(users with "x" rating on codeforces) where x is the rating of there real account. What will list: users witch have or had rating of x. Remember: google helps in about 90% times nowadays(got stronger by the years).
2. Before you do it you have to at least know the following 2 things:↵
- the rating↵
- the first letter of there user name↵
↵
yes, knowing there rating is sometimes enough(you can find the most suspicious one and think it's him) but not always works that way. How to find all the user names with x rating: you can google(users with "x" rating on codeforces) where x is the rating of there real account. What will list: users witch have or had rating of x. Remember: google helps in about 90% times nowadays(got stronger by the years).