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

Hacker
Rank
Score
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00

[deleted]

173330
flag of null
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
173330
flag of India
00.00
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