#1772. C++-数学-素数对

C++-数学-素数对

Background

Description

素数对的概念是指两个相差为2的素数组合。例如，5和7、17和19等是素数对，9和7不是素数对。

Format

Input

Output

Samples

Limitation

1s, 1024KiB for each test case.

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