This is a repository of Data Structures and Algorithms theory and problems!
| Index | Problem | Difficulty |
|---|---|---|
| 0 | Area, Volume and perimeter Questions | Easy |
| 1 | Amstrong Number | Easy |
| 2 | Automatic Type Cast | Easy |
| 3 | Case Checking | Easy |
| 4 | Conditionals | Easy |
| 5 | Even or Odd Number | Easy |
| 6 | Factorial of a Number | Easy |
| 7 | Factors of a Number | Easy |
| 8 | Fibonacci Sequence | Easy |
| 9 | Greeting Message | Easy |
| 10 | Taking Inputs | Easy |
| 11 | Largest Number | Easy |
| 12 | Maximum Number Until 0 | Easy |
| 13 | Operations | Easy |
| 14 | Check if Number is Prime | Easy |
| 15 | Primitive Datatypes | Easy |
| 16 | Addition of Two Numbers | Easy |
| 17 | Sum of Numbers Until 0 | Easy |
| 18 | Switch and Enhanced Switch | Easy but NEW |
| 19 | Type Casting | Easy |
| Area, Volume and perimeter Questions | Easy |
| Index | Problem | Difficulty |
|---|---|---|
| 1 | Amstrong Number | Easy |
| 2 | Highest Common Factor Naive | Easy |
| 3 | Least Common Multiple Naive | Easy |
| 4 | Matrix Addition | Easy |
| 5 | Matrix Multiplication | Medium |
| 6 | Transpose of a Matrix | Easy |
Important Concept : Working of Swapping Program Video
| Index | Concept | Difficulty |
|---|---|---|
| 1 | Greeting Message | Easy |
| 2 | Simply Passing Values | Easy |
| 3 | Passing Values of Primitive Datatypes | Easy but Concept New |
| 4 | Changing Values of Compex Datatypes like Objects and References | Easy but Concept New |
| 5 | Shadowing Concept in Java | Easy but Concept New |
| 6 | Overloading | Easy |
| 7 | Strings as Arguments | Easy |
| 8 | Simple Sum Function in Java | Easy |
| 9 | Why Swapping in Java this way doesn't work?! | Medium |
| 10 | Variable Arguments | Easy |
Video Tutorial
Github repo with the code from the tutorial
| Index | Problem | Difficulty | Solution |
|---|---|---|---|
| 1 | Build Array from Permutation | Easy | Link |
| 2 | Array Concatenation | Easy | Link |
| 3 | Running Sum of 1D Array | Easy | Link |
| 4 | Richest Customer Wealth | Easy | Link |
| 5 | Shuffle Array | Easy | Link |
| 6 | Kids With Greatest Numer of Candles | Easy | Link |
| 7 | Number of Good Pairs | Easy | Link |
| 8 | Transpose Matrix | Easy | Link |
| 9 | Find numbers with even number of digits | Easy | Link |
| 10 | Find numbers with odd number of digits | Easy | Link |
| 11 | How many Numbers are Smaller than the current number | Easy | Link |
| 12 | Check if Sentence is a Panagram | Easy | Link |
| 13 | Count Items Matching A Rule | Easy | Link |
| 14 | Flip and Invert Image | Easy | Link |
| 15 | Find the Highest Altitude | Easy | Link |
| 16 | Cells With Odd Values in Matrix | Medium | Link |
| 17 | Matrix Diagonal Sum | Easy | Link |
Concept Video : Link
Comm. Classroom Github : Link
| Index | Problem | Difficulty | Solution |
|---|---|---|---|
| 1 | Search in Strings | Easy | Link |
| 2 | Search In Range | Easy | Link |
Concept Video : Link
Comm. Classroom Github : Link
| Index | Problem | Difficulty | Solution |
|---|---|---|---|
| 1 | Binary Search Algorithm | Easy | Link |
| 2 | Agnostic Binary Search Algorithm | Easy | Link |
| 3 | Ceiling of an element in the array | Easy | Link |
| 4 | Floor of an element in the array | Easy | Link |
| 5 | Smallest Letter | Easy | Link |
| 6 | First and Last Element of Sorted Array | Medium | Link |
| 7 | Postion of Element in Infinite Sorted Array | Medium | Link |
| 8 | Peak Index In Mountain Array | Medium | Link |
| 9 | Find in Mountain Array | Medium | Link |