Why the hell I can’t view full leaderboard just because there is no way in controls to select “Country - All”. At least, I wasn’t able to find it.
Thus, I tried to guess link:
https://www.codingame.com/leaderboards/challenge/code4life/country/all
https://www.codingame.com/leaderboards/challenge/code4life/country/any
https://www.codingame.com/leaderboards/challenge/code4life/
https://www.codingame.com/leaderboards/challenge/code4life/world
All of them redirect to
https://www.codingame.com/leaderboards/challenge/code4life/country/ru
At least for me.
Update: Country selection appears if you sign in. But I still consider this as bug.