Multihtreading added

CMakeLists.txt

@@ -1,3 +1,17 @@
 cmake_minimum_required(VERSION 3.3)
+
+if(NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Release)
+endif()
+
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_FLAGS "-Wall -Wextra")
+set(CMAKE_CXX_FLAGS_DEBUG "-g")
+set(CMAKE_CXX_FLAGS_RELEASE "-O3")
+#set(CMAKE_CXX_FLAGS_RELEASE "-march=native")
+
+find_package(Threads REQUIRED)
+
 add_executable(main main.cpp)
+target_link_libraries(main Threads::Threads)
 set(SOURCE_EXE main.cpp )