The New Year holidays are over, but Resha doesn't want to throw away the New Year tree. He invited his best friends Kerim and Gural to help him to redecorate the New Year tree.The New Year holidays are over, but Resha d
阅读背景：
CodeForces 620E New Year Tree(线段树的骚操作第二弹)
来源：互联网
分享到：
