Mostofyouknowthismathematicalgame,ofcourse.Youandyourfr...
問題詳情：Mostofyouknowthismathematicalgame,ofcourse.Youandyourfrienddrawcrossesandcirclesonasheetofpaper.Youdoitoneafteranother.Thefirstpupilwhogetsthreemarksinarowwins.Butdoyouknowthatyoucanplaythisga...