C++ Solution to "Swap Nodes in Pairs" on LeetCode under LGMSOC21

[AtrikGit6174]

I would like to add the C++ Solution to "Swap Nodes in Pairs" on LeetCode under LGMSOC21. It is using recursion. https://leetcode.com/explore/learn/card/recursion-i/250/principle-of-recursion/1681/

Please assign me this issue. @Amit366 @ravikr126 @Ayush7614

Programming language

• [ ] C
• [ ] C++
• [ ] Java
• [ ] Python

[2000shivam659]

Please assign me this under LGM-SOC'21 @Amit366 @ravikr126 @Ayush7614

Programing Language

• [ ] C
• [ ] C++
• [x] Java
• [ ] Python