mateforum.ro Forum Index mateforum.ro

 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

OBM 2009

 
Post new topic   Reply to topic    mateforum.ro Forum Index -> Olimpiada Balcanica de Matematica
View previous topic :: View next topic  
Author Message
Beniamin Bogosel
Co-admin


Joined: 07 Mar 2008
Posts: 760
Location: Chambery, Franta

PostPosted: Sat May 02, 2009 1:27 pm    Post subject: OBM 2009 Reply with quote

Aici gasiti problemele de la OBM 2009.
_________________
Yesterday is history,
Tomorow is a mistery,
But today is a gift.
That's why it's called present. Smile

Blog
Back to top
View user's profile Send private message Visit poster's website Yahoo Messenger
Virgil Nicula
Euler


Joined: 28 Sep 2007
Posts: 672

PostPosted: Sat May 02, 2009 3:37 pm    Post subject: Reply with quote

Pentru problema 2 (geometrie) vezi cateva solutii frumoase aici.
Back to top
View user's profile Send private message
Laurian Filip
Site Admin


Joined: 25 Nov 2007
Posts: 473
Location: Bucuresti

PostPosted: Sun May 03, 2009 7:52 am    Post subject: Reply with quote

Rezultatele pe tari

Rezultatele individual

\begin{array}{cc} 
Loc & Nume \ Prenume &&& P1 &P2&P3&P4&&&Sum \\ 
|& & && && && &&&\\
12 &  Persu \  Madalina &&& 10 & 10 & 0 & 1 &&& 21 \\ 
13 & Padurariu \ Tudor &&& 10 & 10 & 1 & 0 &&& 21 \\
22 & Bumbacea \ Radu &&& 6 & 1 & 9 & 1 &&& 17 \\ 
24 & Cerrahoglu \ Omer &&& 10 & 0 & 4 & 1 &&& 15 \\
29 & Deneanu \ Andrei &&& 6 & 3 & 0 & 4 &&& 13 \\
37 & Mania \ Horia &&& 4 & 3 & 2 & 0 &&& 9 
\end{array}

Primii 4 au luat premiul 2, iar ultimii 2, premiul 3.
Padurariu Tudor a luat si un premiu special pt solutia de la problema 2.

Am pus aici rezultatele intr-un tabel de excel pentru a putea fi vazute si aranjate mai usor (l-am facut in xlsx cu Solid PDF Tools).

Dupa calculele mele, clasamentul pe tari e cam asa:
1. Serbia (133p)
2. Turcia (131p)
3. Bulgaria (128p)
4. Romania (96p)

Iar dintre tarile invitate, care nu au participat oficial, Kazakhstan (112p) si Italia (107p) au devansat Romania.
_________________
Bac Mat: Formule bacalaureat matematica
Triangle Solver: Rezolva orice triunghi
Gaseste Scrabble: Castiga la jocul cuvintelor
Resigilate PCG: Top oferte desigilate pcg + istoric pret


Last edited by Laurian Filip on Sun May 03, 2009 10:41 pm; edited 4 times in total
Back to top
View user's profile Send private message Visit poster's website
mihai++
Bernoulli


Joined: 28 Nov 2007
Posts: 217
Location: Focsani

PostPosted: Sun May 03, 2009 11:52 am    Post subject: Reply with quote

Problemele au fost ultra clasice (in afara de 3) si in acelasi timp nu foarte frumoase. Mi s-a parut ca au cam ratat balcaniada de anul asta.
_________________
n-ar fi rau sa fie bine :)
Back to top
View user's profile Send private message
Beniamin Bogosel
Co-admin


Joined: 07 Mar 2008
Posts: 760
Location: Chambery, Franta

PostPosted: Sun May 03, 2009 12:42 pm    Post subject: Reply with quote

Din nou romanii nostri nu prea au obtinut mare lucru... Nu mai stiu ce sa cred... cand vad ce probleme rezolva ai nostri la baraje, mi se par avioane pe langa ce se dau aici, si totusi pe astea nu le rezolva. Nu stiu unde este problema... dar sper sa se rezolve cat mai curand.
_________________
Yesterday is history,
Tomorow is a mistery,
But today is a gift.
That's why it's called present. Smile

Blog
Back to top
View user's profile Send private message Visit poster's website Yahoo Messenger
Laurian Filip
Site Admin


Joined: 25 Nov 2007
Posts: 473
Location: Bucuresti

PostPosted: Sun May 03, 2009 2:23 pm    Post subject: Reply with quote

Pai in primul rand, cred ca una dintre probleme este selectarea lotului, mai exact sistemul de anul asta in care rezultatul de la nationala conta.
Romanii in ordinea punctajelor de la BMO si in paranteza punctajul de la nationala:

Persu Madalina (15 pct)
Padurariu Tudor (23 pct)
Bumbacea Radu (22 pct)
Cerrahoglu Omer (28 pct)
Deneanu Andrei (15 pct)
Mania Horia (28 pct)

Este totusi destul de normal ca cei care invata pt nationala incat chiar sa ia punctaj mare, sa nu aibe destul timp sa se pregateasca si de materia de inter. Mai ales la clasa a 11-a si a 12-a unde materia de nationala are foarte putin, daca nu chiar nimic in comun cu cea de internationala.

Intamplator anul asta, lotul de balcaniada ar fi fost acelasi si fara "punctele de baraj". Asta este, au avut o zi proasta la BMO sau au avut altii zile proaste la baraje.

Quote:
... cand vad ce probleme rezolva ai nostri la baraje, mi se par avioane pe langa ce se dau aici, si totusi pe astea nu le rezolva. Nu stiu unde este problema.... dar sper sa se rezolve cat mai curand.

Cred ca e si din cauza presiunii si a emotiilor. Da, suna cam aiurea, dar am patit-o si eu ca junior la jbmo2007 si alta explicatie nu gasesc.
_________________
Bac Mat: Formule bacalaureat matematica
Triangle Solver: Rezolva orice triunghi
Gaseste Scrabble: Castiga la jocul cuvintelor
Resigilate PCG: Top oferte desigilate pcg + istoric pret
Back to top
View user's profile Send private message Visit poster's website
cristi_lazar
Euclid


Joined: 09 Mar 2009
Posts: 24
Location: IASI

PostPosted: Sun May 03, 2009 10:06 pm    Post subject: Reply with quote

Intrebari retorice:
1) oare nu e prea multa combinatorica la baraje? (vezi diferente majore intre sub. de la barajul pt juniori si cele 2 de la seniori)
2) oare bun la matematica nu inseamna bun si pentru baraje? eu asa vad implicatia.
Cei care au tins catre punctaje minime la clasa si erau priceputi doar la baraje nu se cheama oare rebusisti??
O ultima observatie se refera la faptul ca e impardonabila ratarea primelor 2 probleme (i.e. 20 pct).
Back to top
View user's profile Send private message Yahoo Messenger
enescu
Thales


Joined: 20 May 2008
Posts: 171

PostPosted: Mon May 04, 2009 12:28 am    Post subject: Reply with quote

cristi_lazar wrote:

Cei care au tins catre punctaje minime la clasa si erau priceputi doar la baraje nu se cheama oare rebusisti??

Dan Schwarz (care e langa mine) ma roaga sa postez in numele lui urmatorul text:
"Declar cu mandrie ca sunt un excelent rebusist, atat la cuvinte incrucisate in limba romana, cat si in engleza."
_________________
Bogdan Enescu
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic    mateforum.ro Forum Index -> Olimpiada Balcanica de Matematica All times are GMT + 2 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Powered by phpBB © 2001, 2005 phpBB Group