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863E2000· candidate master2s256 MB⌨ stdin/stdout
Examples
Sample 1of 4
Input
31 34 61 7
Output
1
Sample 2of 4
Input
20 100 10
Output
1
Sample 3of 4
Input
31 23 46 8
Output
-1
Sample 4of 4
Input
31 22 33 4
Output
2
58%
863E.cpp
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Ln 11·137 BGNU C++20 (64)