Insert a node at the head of a linked list

Hacker
Rank
Score
370584
flag of United States
00.00
370584
flag of Taiwan
00.00
370584
flag of India
00.00
370584
flag of Palestinian Territory, Occupied
00.00
370584
flag of Canada
00.00
370584
flag of United States
00.00
370584
flag of United States
00.00
370584
flag of Ukraine
00.00
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