This is pdfTeX, Version 3.1415926-2.4-1.40.13 (MiKTeX 2.9 64-bit) (preloaded format=pdflatex 2013.8.20)  17 SEP 2013 21:48
entering extended mode
**C:/Users/Linn/Desktop/newSvn/basic01/problems/sentinels/statement/sentinels.t
ex

(C:/Users/Linn/Desktop/newSvn/basic01/problems/sentinels/statement/sentinels.te
x
LaTeX2e <2011/06/27>
Babel <v3.8m> and hyphenation patterns for english, afrikaans, ancientgreek, ar
abic, armenian, assamese, basque, bengali, bokmal, bulgarian, catalan, coptic, 
croatian, czech, danish, dutch, esperanto, estonian, farsi, finnish, french, ga
lician, german, german-x-2012-05-30, greek, gujarati, hindi, hungarian, iceland
ic, indonesian, interlingua, irish, italian, kannada, kurmanji, latin, latvian,
 lithuanian, malayalam, marathi, mongolian, mongolianlmc, monogreek, ngerman, n
german-x-2012-05-30, nynorsk, oriya, panjabi, pinyin, polish, portuguese, roman
ian, russian, sanskrit, serbian, slovak, slovenian, spanish, swedish, swissgerm
an, tamil, telugu, turkish, turkmen, ukenglish, ukrainian, uppersorbian, usengl
ishmax, welsh, loaded.

! LaTeX Error: Environment problem undefined.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.1 \begin{problem}
                   {Стражи}{sentinels.in}{sentinels.out}{2 секун�...

? 
! Emergency stop.
 ...                                              
                                                  
l.1 \begin{problem}
                   {Стражи}{sentinels.in}{sentinels.out}{2 секун�...

Your command was ignored.
Type  I <command> <return>  to replace it with another command,
or  <return>  to continue without it.

 
Here is how much of TeX's memory you used:
 9 strings out of 493921
 440 string characters out of 3147285
 49031 words of memory out of 3000000
 3401 multiletter control sequences out of 15000+200000
 3640 words of font info for 14 fonts, out of 3000000 for 9000
 841 hyphenation exceptions out of 8191
 5i,0n,4p,166b,16s stack positions out of 5000i,500n,10000p,200000b,50000s
!  ==> Fatal error occurred, no output PDF file produced!
