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20102010 20092009

20082008

20052005

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/* Story */

Codility

/* Story */

Codility

/* Story */

Codility

/* Story */

Codility

/* Story */

Codility

/* Hiring */

Codility

/* Hiring */

Codility

/* Hiring */

Codility

A B C D

p

Codility

A B C D

p

A B C D

p

Codility

CodilityA.D. 1044

Codility

2010 - Shanghai Jiao Tong University, China2009 - Saint Petersburg State University, Russia2008 - Saint Petersburg State University, Russia2007 - Warsaw University, Poland2006 - Saratov State University, Russia2005 - Shanghai Jiao Tong University, China2004 - Saint Petersburg State University, Russia2003 - University of Warsaw, Poland2002 - Shanghai Jiao Tong University, China

Codility

Codility

A B C D

p

Codility

A B C D

p

A B C D

p

Codility

A B C ED

prev curr next

Codility

A B C ED

prev curr next

Codility

A B C ED

prev curr next

Codility

A B C ED

prev curr next

Codility

A B C ED

prev curr next

Codility

A B C ED

prev curr next

Codility

A B C ED

prev curr next

Codility

A B C ED

prev curr next

N* reverse(N* p) { if (!p) return p; prev = NULL; curr = p; next = p->next; while (next) { curr->next = prev; prev = curr; curr = next; next = next->next; } return curr;}

przełóż wskaźnik listy

przesuń prev/curr/next

Codility

A B C D

p

A B C D

LISTA

STOS

Codility

A B C D

Codility

B C D

A

Codility

C D

B A

Codility

D

C B A

Codility

D C B A

Codility

Stack reverse(Stack src) { Stack dest; while (src.nonempty()) { x = src.pop(); dest.push(x); } return dest;}

Codility

Stack reverse(Stack s){ Stack d; while (s.nonempty()) { x = s.pop(); d.push(x); } return d;}

N* reverse(N* s){ d = NULL; while (s) { x = s; s = s->next; x->next = d; d = x; } return d;}

Codility

Codility

Idea!

Codility

Idea!

-7 1 5 2 -4 3 0

Codility

suma = -1 suma = -1

punkt równowagi

-7 1 5 2 -4 3 0

Codility

suma = 0 suma = 0(ciąg pusty)

punkt równowagi

-7 1 5 2 -4 3 0

Codility

def equi(A): for j in xrange(len(A)): if sum(A[:j]) == sum(A[j+1:]): return j return -1

Codility

Codility

90%

Codility

Codility

Codility

Codility

Codility

Codility

Candidate ranking

34

http://codility.com/demo/take-sample-test/

35

CO DALEJ?

35

CO DALEJ?

Mutacje zadań

35

CO DALEJ?

Mutacje zadań

Ocena adaptatywna

35

CO DALEJ?

Mutacje zadań

Ocena adaptatywna

Model Checking(praktyki!)

36

Info, praktyki, foto-opportunities:

Grzegorz JakackiCodility CTO&CEO

jakacki@codility.com

CodilityWe test coders