09 2020 档案

摘要：https://leetcode.com/problems/count-number-of-nice-subarrays/ Given an array of integers nums and an integer k. A continuous subarray is called nice i 阅读全文

摘要：Link: https://leetcode.com/problems/subarrays-with-k-different-integers/ Given an array A of positive integers, call a (contiguous, not necessarily di 阅读全文