cf/mirror

Second Order Statistics

CF
22A800· newbie2s256 MB⌨ stdin/stdout
#brute force

Examples

Sample 1of 2
Input
4
1 2 2 -4
Output
1
Sample 2of 2
Input
5
1 2 3 1 1
Output
2
22A.cpp
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Ln 11·137 BGNU C++20 (64)