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

Hacker
Rank
Score
174727
flag of United States
00.00
174727
flag of United States
00.00
174727
flag of United States
00.00
174727
flag of India
00.00
174727
flag of India
00.00
174727
flag of India
00.00
174727
flag of India
00.00
174727
flag of India
00.00
174727
flag of India
00.00
174727
flag of Turkey
00.00
174727
flag of
00.00
174727
flag of India
00.00
174727
flag of India
00.00
174727
flag of Morocco
00.00
174727
flag of India
00.00
174727
flag of India
00.00
174727
flag of Viet Nam
00.00
174727
flag of United States
00.00
174727
flag of India
00.00
174727
flag of India
00.00
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