Is This a Binary Search Tree?

Hacker
Rank
Score
01
flag of Spain
30.00
01
flag of United States
30.00
01
flag of United Kingdom
30.00
01
flag of United States
30.00
01
flag of United States
30.00
01
flag of Australia
30.00
01
flag of United States
30.00
01
flag of Egypt
30.00
01
flag of United States
30.00
01
flag of Canada
30.00
01
flag of United States
30.00
01
flag of United States
30.00
01
flag of United States
30.00
01
flag of India
30.00
01
flag of India
30.00
01
flag of United States
30.00
01
flag of United States
30.00
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