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

Hacker
Rank
Score
172528
flag of India
00.00
172528
flag of India
00.00
172528
flag of India
00.00
172528
flag of India
00.00
172528
flag of United Kingdom
00.00
172528
flag of India
00.00
172528
flag of India
00.00
172528
flag of India
00.00

[deleted]

172528
flag of null
00.00
172528
flag of India
00.00
172528
flag of India
00.00
172528
flag of India
00.00
172528
flag of Pakistan
00.00
172528
flag of India
00.00
172528
flag of Pakistan
00.00
172528
flag of India
00.00
172528
flag of Vietnam
00.00
172528
flag of India
00.00
172528
flag of India
00.00
172528
flag of Nepal
00.00
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