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

Hacker
Rank
Score
161439
flag of United States
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of Vietnam
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of Singapore
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of India
00.00
161439
flag of Turkey
00.00
161439
flag of Ethiopia
00.00
161439
flag of India
00.00
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