I wouldn't wait an answer like this from you :) But i laughed thanks.

it's called ternary operator. it's syntax is:
(a condition) ? (statement 1) : (statement 2);
if (a condition) is true, then statement 1 works. else, statement 2 works.
it is like if, else statement. it could be written like this:

if(a condition)
{
statement 1;
}

else
{
statement 2;
}

i didn't understand the description. "team's action" means what? how can you decide which team will win? could somebody help me.

i have solved this kata in c# and test doesn't check for a string. it checks for IEnumerable so you don't have to make a cast. i think you couldn't understand the kata very well.
the kata says "returns a list of items without any elements with the same value NEXT TO EACH OTHER ". you gave attention to it, right?
all i say is nothing wrong with tests so you would want to try to solve the kata again.

easy peasy this solution is squeezy

ahah clever solution. i liked it.

again g964 and again bad kata explanation. really, enough!

smooth. i liked it.

https://ibb.co/Cv0975m
it is a screenshot of my desktop. in log, left aligned directions are input(there are 10 directions in photo) the others are my solution. as you see my answer is correct one but my solutions didnt accepted. also, it is not the only problem. when i attempt, sometimes i take 8/10 pass, sometimes 5/10 pass. when i look log, i see these differences like in photo

c# tests are broken.

the kata wants space each floor too. for example if your tower's last floor has 6 star, than your first floor need to have 1 star and 5 spaces. your second floor needs to have 2 stars 4 spaces, your third floor needs to have 3 stars 3 spaces and goes on. you must add spaces too. i know, it is silly but kata's tests want it.