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

Hacker
Rank
Score
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of United States
00.00
161379
flag of India
00.00
161379
flag of Australia
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of Netherlands
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of India
00.00
161379
flag of India
00.00
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