摘要： 题目链接 讲道理距离上一次写这种求值的题已经不知道多久了。 括号肯定是左括号在乘号的右边， 右括号在左边。 否则没有意义。 题目说乘号只有15个， 所以我们枚举就好了。 include include include include include include include include i 阅读全文

摘要： 题目链接 有趣的题。 给一个图， n个点m条边。 有k个点不可选择。 现在让你选出一个非空的点集， 使得点集中strength最小的点的strength最大。 strength的定义：一个点周围的点中在集合里的点/一个点周围的点。 我们二分这个strength值。 每次二分， 我们遍历每个点， 然后 阅读全文

摘要： 题目链接 题目大意： 给出n个数， 让你求出有多少个5元组满足 i include include include include include include include include include include include include include using namesp 阅读全文