added README

README.md

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+<h1>205.1 Functional Programming</h1>
+
+<p align="center">
+    <img src="icon.svg" width="80" alt="Lambda in the colors of the Scala logo (red)">
+</p>
+
+---
+<h2>Table of Contents</h2>
+<!-- TOC -->
+  * [Lessons](#lessons)
+    * [Lesson 1 - Evaluation](#lesson-1---evaluation)
+    * [Lesson 2 - Higher order functions](#lesson-2---higher-order-functions)
+    * [Lesson 3 - Data structures](#lesson-3---data-structures)
+  * [Assignments](#assignments)
+    * [Assignment 1 - Square root](#assignment-1---square-root)
+    * [Assignment 2 - Map-reduce](#assignment-2---map-reduce)
+    * [Assignment 3 - Binary tree](#assignment-3---binary-tree)
+<!-- TOC -->
+---
+
+## Lessons
+
+### Lesson 1 - Evaluation
+[Files](src/Lesson1)
+- Call by name / Call by value
+- State-less functions
+
+### Lesson 2 - Higher order functions
+[Files](src/Lesson2)
+- Curryfication
+- Recursion
+- Tail recursion
+
+### Lesson 3 - Data structures
+[Files](src/Lesson3)
+- Functional data structures
+- Binary tree
+- Operation precedence
+
+## Assignments
+
+### Assignment 1 - Square root
+[Files](src/Assignment1)
+- Recursion
+- Newton
+- Tail recursion
+
+### Assignment 2 - Map-reduce
+[Files](src/Assignment2)
+- Fibonacci
+- Sum
+- Map-reduce
+
+### Assignment 3 - Binary tree
+[Files](src/Assignment3)
+- Int set
+- Binary tree
+- Union / intersection / foreach

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