Add new methods for DPs.

[extinctsion]

Kindly fork the repo before making changes. Beginners may make changes in the readme.md. Legit PRs will be accepted.

[Sagarkumar7]

please assign me this issue

[Devamsingh09]

Assign this issue to me.

[extinctsion]

@Sagarkumar7 @Devamsingh09 pls tell me what methods are you going to include. Ill assign the tasks accordingly.