.Zzumbong

난이도 [ 🤔 ] Medium 문제 설명 You are given a 0-indexed integer array nums of length n. The average difference of the index i is the absolute difference between the average of the first i + 1 elements of nums and the average of the last n - i - 1 elements. Both averages should be rounded down to the nearest integer. Return the index with the minimum average difference. If there are multiple such indice..

난이도 [ 🤔 ] Medium 문제 설명 Given a string s, sort it in decreasing order based on the frequency of the characters. The frequency of a character is the number of times it appears in the string. Return the sorted string. If there are multiple answers, return any of them. 문자열 s에 문자가 등장횟수만큼 내림차순 정렬한다. aaaccc, cccaaa 는 둘다 정답이란다. 숫자만 신경쓰면 된다. 입출력 예 Example 1: Input: s = "tree" Output: "eert" Explanation: ..

난이도 [ 🤔 ] Medium 문제 설명 Two strings are considered close if you can attain one from the other using the following operations: Operation 1: Swap any two existing characters. For example, abcde -> aecdb Operation 2: Transform every occurrence of one existing character into another existing character, and do the same with the other character. For example, aacabb -> bbcbaa (all a's turn into b's, and..

난이도 [ 😊 ] Easy 문제 설명 You are given a string s of even length. Split this string into two halves of equal lengths, and let a be the first half and b be the second half. Two strings are alike if they have the same number of vowels ('a','e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'). Notice that s contains uppercase and lowercase letters. Return true if a and b are alike. Otherwise, return false. 짝수 ..