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

Hacker
Rank
Score
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of Malaysia
00.00
173496
flag of India
00.00
173496
flag of India
00.00
173496
flag of Italy
00.00
173496
flag of India
00.00
173496
flag of Canada
00.00
173496
flag of India
00.00
173496
flag of India
00.00
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