Trees: Is This a Binary Search Tree?

Hacker
Rank
Score
100597
flag of Mexico
16.155
100597
flag of United States
16.155
100597
flag of India
16.155
100597
flag of United States
16.155
100597
flag of India
16.155
100597
flag of Hungary
16.155
100597
flag of United States
16.155
100597
flag of Brazil
16.155
100597
flag of United States
16.155
100597
flag of United States
16.155
100597
flag of United States
16.155
100597
flag of India
16.155
100597
flag of Canada
16.155
100597
flag of United States
16.155
100597
flag of Japan
16.155
100597
flag of Japan
16.155
100597
flag of United States
16.155
100597
flag of United States
16.155
100597
flag of Singapore
16.155
100597
flag of India
16.155
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