Merge branch '6'

# Conflicts:
#	.gitignore
#	Alogrithm/.vs/Alogrithm/v16/.suo
#	Alogrithm/Alogrithm/Alogrithm.vcxproj
#	Alogrithm/Alogrithm/Alogrithm.vcxproj.filters
#	Alogrithm/UnitTest/UnitTest.cpp
#	Alogrithm/UnitTest/UnitTest.vcxproj
#	Alogrithm/UnitTest/pch.h

.gitignore

@@ -99,3 +99,6 @@ Alogrithm/.vs/Alogrithm/v16/ipch/AutoPCH/481f9764231e57bf/4_ISPALINDROME.ipch
 Alogrithm/.vs/Alogrithm/v16/ipch/AutoPCH/76af66dca66611c4/5_MINDEPTH.ipch
 Alogrithm/.vs/Alogrithm/v16/ipch/AutoPCH/caf245688b80a979/5_MINDEPTH.ipch
 Alogrithm/Alogrithm/Debug/5_MinDepth.obj
+Alogrithm/.vs/Alogrithm/v16/ipch/AutoPCH/3074205571b356e6/6_CONTAINSDUPLICATE.ipch
+Alogrithm/.vs/Alogrithm/v16/ipch/AutoPCH/ab4a44a8d749bee1/6_CONTAINSDUPLICATE.ipch
+Alogrithm/Alogrithm/Debug/6_ContainsDuplicate.obj