3647 [APIO2014] Lianzhu line< /h1> Title description< /h2> During the Da Vinci era, there was a popular children’s game called Renzhu Line. Of course, this game is about beads and threads. T
3647 [APIO2014] Lianzhu line< /h1> Title description< /h2> During the Da Vinci era, there was a popular children’s game called Renzhu Line. Of course, this game is about beads and threads. T