Project Euler #136: Singleton difference

Hacker
Rank
Score
65
flag of Ireland
00.00
65
flag of India
00.00
65
flag of United States
00.00
65
flag of India
00.00
65
flag of United States
00.00
65
flag of United States
00.00
65
flag of India
00.00
65
flag of Germany
00.00
65
flag of India
00.00
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