文章 <div class"contentBox"><p>这是一篇范文——仅供测试使用</p><p>With the coming of national day, I have a one week holiday. I reallyexpect to it, because it want to have a short trip during these days. Iwill travel to Ji…
通信线路 思路:我们考虑需要升级的那条电缆的花费,若其花费为 w ,那么从 1 到 n 的路径上,至多存在 k 条路径的价值大于 w ,这具有一定的单调性,当花费 w 越大,我们路径上价值大于 w 的花费会越…