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Tutorials >	** 30 Days of Code	** Cracking the Coding Interview	** 10 Days of Statistics

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This project is licensed under the MIT License - see the LICENSE file for details

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30 Days of Code

Day	Challenge	Difficulty	Points	Solution
0	Hello, World	Easy	30	Solution.java
1	Data Types	Easy	30	Solution.java
2	Operators	Easy	30	Solution.java
3	Intro to Conditional Statements	Easy	30	Solution.java
4	Class vs. Instance	Easy	30	Solution.java
5	Loops	Easy	30	Solution.java
6	Let's Review	Easy	30	Solution.java
7	Arrays	Easy	30	Solution.java
8	Dictionaries and Maps	Easy	30	Solution.java
9	Recursion	Easy	30	Solution.java
10	Binary Numbers	Easy	30	Solution.java
11	2D Arrays	Easy	30	Solution.java
12	Inheritance	Easy	30	Solution.java
13	Abstract Classes	Easy	30	Solution.java
14	Scope	Easy	30	Solution.java
15	Linked List	Easy	30	Solution.java
16	Exceptions - String to Integer	Easy	30	Solution.java
17	More Exceptions	Easy	30	Solution.java
18	Queues and Stacks	Easy	30	Solution.java
19	Interfaces	Easy	30	Solution.java
20	Sorting	Easy	30	Solution.java
21	Generics	Easy	30	Solution.java
22	Binary Search Trees	Easy	30	Solution.java
23	BST Level-Order Traversal	Easy	30	Solution.java
24	More Linked Lists	Easy	30	Solution.java
25	Running Time and Complexity	Easy	30	Solution.java
26	Nested Logic	Easy	30	Solution.java
27	Testing	Easy	30	Solution.java
28	RegEx, Patterns, and Intro to Databases	Easy	30	Solution.java
29	Bitwise AND	Easy	30	Solution.java

Cracking the Coding Interview

How Companies Evaluate Technical Interviews	How to Approach Behavioral Questions	7 Steps to Solve Algorithm Problems	3 Algorithm Strategies

Topic	Challenge	Difficulty	Points	Solution
Data Structures	Arrays: Left Rotation	Easy	20	Solution.java
Data Structures	Strings: Making Anagrams	Easy	25	Solution.java
Data Structures	Hash Tables: Ransom Note	Easy	25	Solution.java
Data Structures	Linked Lists: Detect a Cycle	Easy	25	Solution.java
Data Structures	Stacks: Balanced Brackets	Medium	30	Solution.java
Data Structures	Queues: A Tale of Two Stacks	Medium	30	Solution.java
Data Structures	Trees: Is This a Binary Search Tree?	Medium	30	Solution.java
Data Structures	Heaps: Find the Running Median	Hard	50	Solution.java
Data Structures	Tries: Contacts	Hard	50	Solution.java
Algorithms	Sorting: Bubble Sort	Medium	30	Solution.java
Algorithms	Sorting: Comparator	Medium	35	Solution.java
Algorithms	Merge Sort: Counting Inversions	Hard	35	Solution.java
Algorithms	Binary Search: Ice Cream Parlor	Medium	45	Solution.java
Algorithms	DFS: Connected Cell in a Grid	Hard	45	Solution.java
Algorithms	BFS: Shortest Reach in a Graph	Hard	45	Solution.java
Techniques / Concepts	Time Complexity: Primality	Medium	15	Solution.java
Techniques / Concepts	Recursion: Fibonacci Numbers	Easy	20	Solution.java
Techniques / Concepts	Recursion: Davis' Staircase	Medium	30	Solution.java
Techniques / Concepts	DP: Coin Change	Hard	30	Solution.java
Techniques / Concepts	Bit Manipulation: Lonely Integer	Easy	60	Solution.java

10 Days of Statistics

Day	Challenge	Difficulty	Points	Solution
0	Mean, Median, and Mode	Easy	30	Solution.java
0	Weighted Mean	Easy	30	Solution.java
1	Quartiles	Easy	30	Solution.java
1	Interquartile Range	Easy	30	Solution.java
1	Standard Deviation	Easy	30	Solution.java
2	Basic Probability	Easy	10	Solution.txt
2	More Dice	Easy	10	Solution.txt
2	Compound Event Probability	Easy	10	Solution.txt
3	Conditional Probability	Easy	10	Solution.txt
3	Cards of the Same Suit	Easy	10	Solution.txt
3	Drawing Marbles	Easy	10	Solution.txt
4	Binomial Distribution I	Easy	30	Solution.java
4	Binomial Distribution II	Easy	30	Solution.java
4	Geometric Distribution I	Easy	30	Solution.java
4	Geometric Distribution II	Easy	30	Solution.java
5	Poisson Distribution I	Easy	30	Solution.java
5	Poisson Distribution II	Easy	30	Solution.java
5	Normal Distribution I	Easy	30	Solution.java
5	Normal Distribution II	Easy	30	Solution.java
6	The Central Limit Theorem I	Easy	30	Solution.java
6	The Central Limit Theorem II	Easy	30	Solution.java
6	The Central Limit Theorem III	Easy	30	Solution.java
7	Pearson Correlation Coefficient I	Easy	30	Solution.java
7	Spearman's Rank Correlation Coefficient	Easy	30	Solution.java
8	Least Square Regression Line	Easy	30	Solution.java
8	Pearson Correlation Coefficient II	Easy	30	Solution.txt
9	Multiple Linear Regression	Easy	30	Solution.java