Non-Overlapping
题解 AtCoder wtf22_day1_b【Non-Overlapping Swaps】
给定一个排列，要求交换最多 $n-1$ 对元素，使得这个排列变成 [1,2,...,n] 的有序排列。
当然没有那么简单，对于交换还是有限制的，对于相邻的两次交换，不妨叫做 $(l_i, r_i)$ 和 $(l_{i+1}, r_{i+1})$，必须满足**这两个交换所对应的区间，没有交集**，即... ......
[LeetCode] 1031. Maximum Sum of Two Non-Overlapping Subarrays
Given an integer array nums and two integers firstLen and secondLen, return the maximum sum of elements in two non-overlapping subarrays with lengths ......