Reverse a doubly linked list

Hacker
Rank
Score
01
flag of United States
100.00
01
flag of India
100.00
01
flag of India
100.00
01
flag of United States
100.00
01
flag of Kenya
100.00
01
flag of United States
100.00
01
flag of United States
100.00
01
flag of Japan
100.00
01
flag of United States
100.00
01
flag of Mexico
100.00
01
flag of India
100.00
01
flag of Netherlands
100.00

[deleted]

01
flag of null
100.00
01
flag of Viet Nam
100.00
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