improve description in 3134 3827, 1058, 1737

reorder tasks in practice 9. add example to task 2733 simplify task 5279 rewrite solutions to use endless loop with break

fix merge conflict

Merge remote-tracking branch 'origin/master'

implement task 8518 as coded task. add task 8682, 7751 to compare strings

implement task 8518 as coded task. add task 8682, 7751 to compare strings

fix text in tasks 2801, 9298, 8307

improve formatting in task 7711

add instructions to task 5001 to add some tags

additional task about sql

add close to task 7361

minor addition to task

fix some unit tests. clarify some task questions add several cases to reproduce problems found by student

add more tasks

improve descriptions to tasks 4043 and 7020

rework source code of task 5108 to clarify error if program failed on writing file

rework source code of task 5108 to clarify error if program failed on writing file

simplify solution of 7738, add more logging messages remove tests 6 because they don't exist

minor fix description in task 1056. add .close calls to solution of task 2312

add task about method call

make field hint_keyword required on uploading wheat

migrate to new version of task xml. add hint_keyword to every haystack

migrate to new version of task xml

manual migration

remove unused code, fix some tests. replace matches, isNeedLess, isNeedMore code to use new getVerdict by mask

add description to main page add hint keywords to some tasks

update version in run.bat

fix some tests in task 8135. rework solution to match what students are supposed to do here