摘要:
A string s is called good if there are no two different characters in s that have the same frequency. Given a string s, return the minimum number of c 阅读全文
摘要:
You are given a 0-indexed integer array nums. The array nums is beautiful if: nums.length is even. nums[i] != nums[i + 1] for all i % 2 == 0. Note tha 阅读全文