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663A1800· expert1s256 MB⌨ stdin/stdout
#constructive algorithms#expression parsing#greedy#math

Examples

Sample 1of 3
Input
? + ? - ? + ? + ? = 42
Output
Possible
9 + 13 - 39 + 28 + 31 = 42
Sample 2of 3
Input
? - ? = 1
Output
Impossible
Sample 3of 3
Input
? = 1000000
Output
Possible
1000000 = 1000000
663A.cpp
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Ln 11·137 BGNU C++20 (64)