diff --git a/Spring-2023/CS-2124/Lectures/Course/Lecture-7.1-Intro-to-Trees.pdf b/Spring-2023/CS-2124/Lectures/Course/Lecture-7.1-Intro-to-Trees.pdf new file mode 100644 index 0000000..69c30dc Binary files /dev/null and b/Spring-2023/CS-2124/Lectures/Course/Lecture-7.1-Intro-to-Trees.pdf differ diff --git a/Spring-2023/CS-2124/Lectures/Course/Lecture-7.2-Intro-to-Trees.pdf b/Spring-2023/CS-2124/Lectures/Course/Lecture-7.2-Intro-to-Trees.pdf new file mode 100644 index 0000000..115242d Binary files /dev/null and b/Spring-2023/CS-2124/Lectures/Course/Lecture-7.2-Intro-to-Trees.pdf differ diff --git a/Spring-2023/CS-2124/Lectures/Course/Lecture-8.1-Heaps.pdf b/Spring-2023/CS-2124/Lectures/Course/Lecture-8.1-Heaps.pdf new file mode 100644 index 0000000..006f9c1 Binary files /dev/null and b/Spring-2023/CS-2124/Lectures/Course/Lecture-8.1-Heaps.pdf differ diff --git a/Spring-2023/CS-2124/Lectures/Course/Lecture-8.2-Heaps.pdf b/Spring-2023/CS-2124/Lectures/Course/Lecture-8.2-Heaps.pdf new file mode 100644 index 0000000..f2728f4 Binary files /dev/null and b/Spring-2023/CS-2124/Lectures/Course/Lecture-8.2-Heaps.pdf differ