Trees: Is This a Binary Search Tree?

Hacker
Rank
Score
114365
flag of United States
00.00
114365
flag of Luxembourg
00.00
114365
flag of Egypt
00.00
114365
flag of United States
00.00
114365
flag of United States
00.00
114365
flag of France
00.00
114365
flag of India
00.00
114365
flag of India
00.00

[deleted]

114365
flag of Mexico
00.00
114365
flag of India
00.00
114365
flag of India
00.00
114365
flag of Ireland
00.00
114365
flag of Italy
00.00
114365
flag of United States
00.00
114365
flag of Greece
00.00
114365
flag of United States
00.00

[deleted]

114365
flag of null
00.00
114365
flag of South Africa
00.00
114365
flag of India
00.00
114365
flag of Canada
00.00
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