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

Hacker
Rank
Score
174687
flag of India
00.00
174687
flag of South Africa
00.00
174687
flag of India
00.00
174687
flag of United States
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of United States
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
174687
flag of India
00.00
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