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### **Describe your change:** - [X] Add an algorithm? - [ ] Fix a bug or typo in an existing algorithm? - [ ] Documentation change? #### References ### **Checklist:**...

starohit

### **Describe your change:** Added RainWater trapping problem's solution in java as I couldn't find the code in the src folder

YashGupta1510

Fibonacci giving strange output if giving large numbers.

5

**Describe the bug** In Fibonacci, all the functions are taking input as `int` and give output as `int`. But if we give a big `int` as input the corresponding Fibonacci...

debasishbsws

### **Describe your change:** - [x] Add an algorithm? - [ ] Fix a bug or typo in an existing algorithm? - [ ] Documentation change? #### References ### **Checklist:**...

varada1110

Request to add PlayFair Cipher!!

1

**Describe the solution you'd like** To provide the source code for the PlayFair cipher in Java.

Ajaiqmar

Request to add pendulum arrangement in the algorithms

2

I didn't found the pendulum arrangement of array in the list I want to contribute the code

supratim1609

### **Describe your change:** - [x] Add an algorithm? - [ ] Fix a bug or typo in an existing algorithm? - [ ] Documentation change? #### References ### **Checklist:**...

DEADPOOL2001

Update ArrayLeftRotation.java

1

This implementation uses the System.arraycopy method to copy the elements of the arr array to the dst array. The first call to System.arraycopy copies the elements from index n to...

Mohsenkhademian

LFUCache unexpected result

2

### Description https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/datastructures/caches/LFUCache.java function: private void addNodeWithUpdatedFrequency(Node node) line 104 I think 104 code line: node.previous = temp.previous; need change: temp.previous = node; ### Steps to reproduce _No response_ ###...

supertonyliu

Butterworth filter design

4

### **Describe your change:** - [x] Add an algorithm? - [ ] Fix a bug or typo in an existing algorithm? - [ ] Documentation change? #### References #3494 ###...

Martmists-GH