update: 1 задание, 2 задание

update: 3 задание

create: new file, update: 3 задание

update: 2 задание

create: 1 задание, 2 задание, 3 задание

update: Binary_tree.cpp

update: Binary_tree.cpp

update: Binary_tree.cpp, Laba5.cpp

create: Binary_tree.cpp, Laba5.cpp, Binary_tree.h

update: README.md

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