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Algorithms (71/71)

Bit Manipulation (3/3)

# Name Solution Test
11001 Lonely Integer ✅💾 ✅💾
11002 Maximizing XOR ✅💾 ✅💾
11006 Flipping bits ✅💾 ✅💾

Decommissioned (1/1)

# Name Solution Test
19901 Solve me second ✅💾 ✅💾

Dynamic Programming (1/1)

# Name Solution Test
10812 The Maximum Subarray ✅💾 ✅💾

Implementation (43/43)

# Name Solution Test
10202 Apple and Orange ✅💾 ✅💾
10203 Kangaroo ✅💾 ✅💾
10204 Between Two Sets ✅💾 ✅💾
10205 Divisible Sum Pairs ✅💾 ✅💾
10208 Bon Appétit ✅💾 ✅💾
10209 Sock Merchant ✅💾 ✅💾
10215 Designer PDF Viewer ✅💾 ✅💾
10216 Utopian Tree ✅💾 ✅💾
10217 Angry Professor ✅💾 ✅💾
10218 Beautiful Days at the Movies ✅💾 ✅💾
10219 Viral Advertising ✅💾 ✅💾
10220 Save the Prisoner! ✅💾 ✅💾
10223 Jumping on the Clouds: Revisited ✅💾 ✅💾
10224 Find Digits ✅💾 ✅💾
10225 Extra Long Factorials ✅💾 ✅💾
10226 Append and Delete ✅💾 ✅💾
10227 Sherlock and Squares ✅💾 ✅💾
10228 Library Fine ✅💾 ✅💾
10229 Cut the sticks ✅💾 ✅💾
10230 Non-Divisible Subset ✅💾 ✅💾
10231 Repeated String ✅💾 ✅💾
10232 Jumping on the Clouds ✅💾 ✅💾
10233 Equalize the Array ✅💾 ✅💾
10235 ACM ICPC Team ✅💾 ✅💾
10236 Taum and B'day ✅💾 ✅💾
10238 Encryption ✅💾 ✅💾
10239 Bigger is Greater ✅💾 ✅💾
10240 Modified Kaprekar Numbers ✅💾 ✅💾
10241 Beautiful Triplets ✅💾 ✅💾
10242 Minimum Distances ✅💾 ✅💾
10243 The Time in Words ✅💾 ✅💾
10244 Chocolate Feast ✅💾 ✅💾
10245 Service Lane ✅💾 ✅💾
10246 Lisa's Workbook ✅💾 ✅💾
10247 Flatland Space Stations ✅💾 ✅💾
10248 Fair Rations ✅💾 ✅💾
10249 Cavity Map ✅💾 ✅💾
10250 Manasa and Stones ✅💾 ✅💾
10251 The Grid Search ✅💾 ✅💾
10252 Flatland Space Stations ✅💾 ✅💾
10253 Strange Counter ✅💾 ✅💾
10254 Absolute Permutation ✅💾 ✅💾
10258 Almost Sorted ✅💾 ✅💾

Sorting (2/2)

# Name Solution Test
10401 Intro to Tutorial Challenges ✅💾 ✅💾
10402 Insertion Sort - Part 1 ✅💾 ✅💾

Strings (10/10)

# Name Solution Test
10302 CamelCase ✅💾 ✅💾
10303 Two Characters ✅💾 ✅💾
10304 Caesar Cipher ✅💾 ✅💾
10305 Mars Exploration ✅💾 ✅💾
10307 Pangrams ✅💾 ✅💾
10310 Strong Password ✅💾 ✅💾
10312 Alternating Characters ✅💾 ✅💾
10314 The Love-Letter Mystery ✅💾 ✅💾
10319 Game of Thrones - I ✅💾 ✅💾
10320 Two Strings ✅💾 ✅💾

Warmup (11/11)

# Name Solution Test
10101 Solve me first ✅💾 ✅💾
10102 Simple Array Sum ✅💾 ✅💾
10103 Compare the Triplets ✅💾 ✅💾
10104 A Very Big Sum ✅💾 ✅💾
10105 Diagonal Difference ✅💾 ✅💾
10106 Plus Minus ✅💾 ✅💾
10107 Staircase ✅💾 ✅💾
10108 Mini-Max Sum ✅💾 ✅💾
10109 Time Conversion ✅💾 ✅💾
10110 Birthday Cake Candles ✅💾 ✅💾
10221 Circular Array Rotation ✅💾 ✅💾

Contests (11/11)

ProjectEuler+ (11/11)

# Name Solution Test
99990001 Project Euler #1: Multiples of 3 and 5 ✅💾 ✅💾
99990002 Project Euler #2: Even Fibonacci numbers ✅💾 ✅💾
99990003 Project Euler #3: Largest prime factor ✅💾 ✅💾
99990004 Project Euler #4: Largest palindrome product ✅💾 ✅💾
99990005 Project Euler #5: Smallest multiple ✅💾 ✅💾
99990006 Project Euler #6: Sum square difference ✅💾 ✅💾
99990007 Project Euler #7: 10001st prime ✅💾 ✅💾
99990008 Project Euler #8: Largest product in a series ✅💾 ✅💾
99990009 Project Euler #9: Special Pythagorean triplet ✅💾 ✅💾
99990010 Project Euler #10: Summation of primes ✅💾 ✅💾
99990011 Project Euler #11: Largest product in a grid ✅💾 ✅💾

Data Structures (14/14)

Arrays (6/6)

# Name Solution Test
20101 Arrays - DS ✅💾 ✅💾
20102 2D Array - DS ✅💾 ✅💾
20103 Dynamic Array ✅💾 ✅💾
20104 Left Rotation ✅💾 ✅💾
20105 Sparse Array ✅💾 ✅💾
20106 Array Manipulation ✅💾 ✅💾

Linked Lists (8/8)

# Name Solution Test
20201 Print the Elements of a Linked List ✅💾 ✅💾
20202 Insert a Node at the Tail of a Linked List ✅💾 ✅💾
20203 Insert a node at the head of a linked list ✅💾 ✅💾
20204 Insert a node at a specific position in a linked list ✅💾 ✅💾
20205 Delete a Node ✅💾 ✅💾
20206 Print in Reverse ✅💾 ✅💾
20207 Reverse a linked list ✅💾 ✅💾
20208 Compare two linked lists ✅💾 ✅💾

Java (64/64)

Advanced (12/12)

# Name Solution Test
40207001 Java Varargs - Simple Addition ✅💾 ✅💾
40207002 Java Reflection - Attributes ✅💾 ✅💾
40207003 Can You Access? ✅💾 ✅💾
40207004 Prime Checker ✅💾 ✅💾
40207005 Java Singleton Pattern ✅💾 ✅💾
40207006 Java Factory Pattern ✅💾 ✅💾
40207007 Java Visitor Pattern ✅💾 ✅💾
40207008 Java Annotations ✅💾 ✅💾
40207009 Covariant Return Types ✅💾 ✅💾
40207010 Java Lambda Expressions ✅💾 ✅💾
40207011 Java MD5 ✅💾 ✅💾
40207012 Java SHA-256 ✅💾 ✅💾

BigNumber (3/3)

# Name Solution Test
40203001 Java BigDecimal ✅💾 ✅💾
40203002 Java Primality Test ✅💾 ✅💾
40203003 Java BigInteger ✅💾 ✅💾

Data Structures (15/15)

# Name Solution Test
40204001 Java 1D Array ✅💾 ✅💾
40204002 Java 2D Array ✅💾 ✅💾
40204003 Java Subarray ✅💾 ✅💾
40204004 Java Arraylist ✅💾 ✅💾
40204005 Java 1D Array (Part 2) ✅💾 ✅💾
40204006 Java List ✅💾 ✅💾
40204007 Java Map ✅💾 ✅💾
40204008 Java Stack ✅💾 ✅💾
40204009 Java Hashset ✅💾 ✅💾
40204010 Java Generics ✅💾 ✅💾
40204011 Java Comparator ✅💾 ✅💾
40204012 Java Sort ✅💾 ✅💾
40204013 Java Dequeue ✅💾 ✅💾
40204014 Java Dequeue ✅💾 ✅💾
40204015 Java Priority Queue ✅💾 ✅💾

Exception Handling (2/2)

# Name Solution Test
40206001 Java Exception Handling (Try-catch) ✅💾 ✅💾
40206002 Java Exception Handling ✅💾 ✅💾

Introduction (13/13)

# Name Solution Test
40201001 Welcome to Java! ✅💾 ✅💾
40201002 Java Stdin and Stdout I ✅💾 ✅💾
40201003 Java If-Else ✅💾 ✅💾
40201004 Java Stdin and Stdout II ✅💾 ✅💾
40201005 Java Output Formatting ✅💾 ✅💾
40201006 Java Loops I ✅💾 ✅💾
40201007 Java Loops II ✅💾 ✅💾
40201008 Java Datatypes ✅💾 ✅💾
40201009 Java End-of-file ✅💾 ✅💾
40201010 Java Static Initializer Block ✅💾 ✅💾
40201011 Java Int to String ✅💾 ✅💾
40201012 Java Date and Time ✅💾 ✅💾
40201013 Java Currency Formatter ✅💾 ✅💾

Object Oriented Programming (8/8)

# Name Solution Test
40205001 Java Inheritance I ✅💾 ✅💾
40205002 Java Inheritance II ✅💾 ✅💾
40205003 Java Abstract Class ✅💾 ✅💾
40205004 Java Interface ✅💾 ✅💾
40205005 Java Method Overriding ✅💾 ✅💾
40205006 Java Method Overriding 2 (Super Keyword) ✅💾 ✅💾
40205007 Java Instanceof keyword ✅💾 ✅💾
40205008 Java Iterator ✅💾 ✅💾

Strings (11/11)

# Name Solution Test
40202001 Java Strings Introduction ✅💾 ✅💾
40202002 Java Substring ✅💾 ✅💾
40202003 Java String Compare ✅💾 ✅💾
40202004 Java String Reverse ✅💾 ✅💾
40202005 Java Anagrams ✅💾 ✅💾
40202006 Java String Tokens ✅💾 ✅💾
40202007 Pattern Syntax Checker ✅💾 ✅💾
40202008 Java Regex ✅💾 ✅💾
40202009 Java Regex 2 - Duplicate Words ✅💾 ✅💾
40202010 Valid Username Regular Expression ✅💾 ✅💾
40202011 Tag Content Extractor ✅💾 ✅💾

Mathematics (6/6)

Fundamentals (6/6)

# Name Solution Test
30102 Maximum Draws ✅💾 ✅💾
30103 Handshake ✅💾 ✅💾
30105 Connecting Towns ✅💾 ✅💾
30118 Halloween party ✅💾 ✅💾
30119 Filling Jars ✅💾 ✅💾
30120 Is Fibo ✅💾 ✅💾

SQL (42/44)

Advanced Select (2/2)

# Name Solution Test
30202001 Type of Triangle ✅💾 ✅💾
30202002 The PADS ✅💾 ✅💾

Aggregation (16/17)

# Name Solution Test
30203001 Revising Aggregations - The Count Function ✅💾 ✅💾
30203002 Revising Aggregations - The Sum Function ✅💾 ✅💾
30203003 Revising Aggregations - Averages ✅💾 ✅💾
30203004 Average Population ✅💾 ✅💾
30203005 Japan Population ✅💾 ✅💾
30203006 Population Density Difference ✅💾 ✅💾
30203007 The Blunder ✅💾 ✅💾
30203008 Top Earners ✅💾 ✅💾
30203009 Weather Observation Station 2 ✅💾 ✅💾
30203010 Weather Observation Station 13 ✅💾 ✅💾
30203011 Weather Observation Station 14 ✅💾 ✅💾
30203012 Weather Observation Station 15 ✅💾 ✅💾
30203013 Weather Observation Station 16 ✅💾 ✅💾
30203014 Weather Observation Station 17 ✅💾 ✅💾
30203015 Weather Observation Station 18 ✅💾 ✅💾
30203016 Weather Observation Station 19 ✅💾 ✅💾
30203017 Weather Observation Station 20 💾 💾

Alternative Queries (0/1)

# Name Solution Test
30206001 Draw The Triangle 1 💾 💾

Basic Join (4/4)

# Name Solution Test
30204001 Asian Population ✅💾 ✅💾
30204002 African Cities ✅💾 ✅💾
30204003 Average Population of Each Continent ✅💾 ✅💾
30204004 The Report ✅💾 ✅💾

Basic Select (20/20)

# Name Solution Test
30201001 Revising the Select Query I ✅💾 ✅💾
30201002 Revising the Select Query II ✅💾 ✅💾
30201003 Select All ✅💾 ✅💾
30201004 Select By ID ✅💾 ✅💾
30201005 Japanese Cities' Attributes ✅💾 ✅💾
30201006 Japanese Cities' Names ✅💾 ✅💾
30201007 Weather Observation Station 1 ✅💾 ✅💾
30201008 Weather Observation Station 3 ✅💾 ✅💾
30201009 Weather Observation Station 4 ✅💾 ✅💾
30201010 Weather Observation Station 5 ✅💾 ✅💾
30201011 Weather Observation Station 6 ✅💾 ✅💾
30201012 Weather Observation Station 7 ✅💾 ✅💾
30201013 Weather Observation Station 8 ✅💾 ✅💾
30201014 Weather Observation Station 9 ✅💾 ✅💾
30201015 Weather Observation Station 10 ✅💾 ✅💾
30201016 Weather Observation Station 11 ✅💾 ✅💾
30201017 Weather Observation Station 12 ✅💾 ✅💾
30201018 Higher Than 75 Marks ✅💾 ✅💾
30201019 Employee Names ✅💾 ✅💾
30201020 Employee Salaries ✅💾 ✅💾