ICPC 2019 vòng Quốc gia - I: IMO Harder Problem
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Points:
1.50
Time limit:
1.0s
Memory limit:
512M
Input:
stdin
Output:
stdout
Problem source:
Problem type
Allowed languages
C, C++, Go, Java, Kotlin, Pascal, PyPy, Python, Rust, Scratch
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Sample Input 1
HH
Sample Output 1
2.0
Sample Input 2
H?
Sample Output 2
1.5
Sample Input 3
??
Sample Output 3
1.5
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