あたまをよくするほうほうをおしえてくださいat MATHあたまをよくするほうほうをおしえてください
- 暇つぶし2ch46:132人目の素数さん 17/10/31 18:17:54.81 BpdaIqKr.net >>45 He often wrote down on pieces of paper what cane to mind. It is a pity that, although people want to protect their own privacy, they want to know what others do in private.