How Many Substrings?

Hacker
Rank
Score
01
flag of Australia
100.00
01
flag of Australia
100.00
01
flag of Australia
100.00

[deleted]

01
flag of null
100.00
01
flag of Australia
100.00
01
flag of Turkey
100.00
01
flag of China
100.00
01
flag of Australia
100.00

[deleted]

01
flag of null
100.00
01
flag of India
100.00
01
flag of China
100.00
01
flag of India
100.00
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