Set .difference() Operation

Hacker
Rank
Score
01
flag of Spain
10.00

[deleted]

01
flag of null
10.00
01
flag of Japan
10.00
01
flag of United States
10.00
01
flag of Switzerland
10.00
01
flag of India
10.00
01
flag of Finland
10.00
01
flag of United States
10.00
01
flag of United States
10.00
01
flag of United States
10.00
01
flag of Republic of Korea
10.00
01
flag of India
10.00
01
flag of Germany
10.00
01
flag of Canada
10.00
01
flag of Mexico
10.00
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