Is the 1st test is a sample one?
Can i use any laguage? Than why i got WA then using "MyLanguage"?

Algo does the order of printed language is important?

russian-english
english-german
english-french

is the same as

english-russian
english-german
english-french

or no?

It is a mistake in sample
output must be
russian-french
russian-german
french-german

it can pass 1st test

i use this but  I got wa3

try

2
a
a

Good test, but now WA6... :(

Really, i do not understand why we cant use some intermidiate language what is known only by translators in order to ahieve minimum?

Problem's definition must be corrected.

We can use any intermediate languages. More exactly - we must use it. Otherwise, you won't pass all the tests.

1. There is language "english" in 15-th test, so if you always will use "english" - you'll get WA
2. You can use your own languages, but they should correspond to restrictions on length and case

Edited by author 06.10.2007 23:05

I also don't understand at all why solution, which out for test

4
a
b
c
d

4
a-b
b-c
c-d
a-d

is incorrect

In your situation, when crews "a" and "c" want to speak each other, they have to use two interpreters: "a-b" and "a-c" (or, may be, "a-d" and "c-d" - it does not matter). But in this case, crew "b" can understand their talk, because language "b" is used in it!

You should always add a language, except special cases with n <= 2.

Edited by author 07.10.2007 21:47

yes you're right!)

There are at least 3 cases when N>2