Add any 5 medium questions from LeetCode under Java

[aayush89890]

• Add any 5 medium questions from LeetCode.
• Also add video links of the solutions from YouTube

[prajakta2809]

Can you assign this to me, I can do this as I am proficient in java and have knowledge of DSA.

[adityamangal1]

Can you assign this to me, I can do this as I am proficient in java and have knowledge of DSA.

Sure go ahead @prajakta2809

[vishwa511]

Can you assign this to me.