Set .discard(), .remove() & .pop()

Hacker
Rank
Score
161370
flag of Nigeria
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of Romania
00.00
161370
flag of United States
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of United Kingdom
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of India
00.00
161370
flag of Armenia
00.00
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