cf/mirror

Pairs of Numbers

CF
134B1900· candidate master1s256 MB⌨ stdin/stdout
#brute force#dfs and similar#math#number theory

Examples

Sample 1of 2
Input
5
Output
3
Sample 2of 2
Input
1
Output
0
134B.cpp
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Ln 11·137 BGNU C++20 (64)
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