soro

added Palindrome Linked List

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**PR Checklist:** - [x] My submission is formatted according to the guidelines in the [contributing guide](https://github.com/MakeContributions/DSA#contribution-guidelines) - [x] My addition is on refer on the language README.md file - [x]...

Closes # Description: Added three important ans useful algorithms. Maximum depth of a binary tree, Check if two trees are some or not and Merging two linked list. #### Checklist...

Typo in ```lightly/benchmarks/imagenet/resnet50/README.md```

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In the ```lightly/benchmarks/imagenet/resnet50/README.md``` file, under the ```"Goals"``` section, the word "resuls" should be corrected to "results." I have raised a PR to fix this typo.