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https://leetcode.com/problems/make-the-string-great/description/ Leetcode - Make The String Great 문제 유형 : 문자열 처리 문제 난이도 : Easy 문제 Given a string s of lower and upper case English letters. A good string is a string which doesn't have two adjacent characters s[i] and s[i + 1] where: 0

https://leetcode.com/problems/maximum-nesting-depth-of-the-parentheses/description/ Leetcode - Maximum Nesting Depth of the Paretheses 문제 유형 : 문자열 처리, 스택 문제 난이도 : Easy 문제 A string is a valid parentheses string (denoted VPS) if it meets one of the following: It is an empty string "", or a single character not equal to "(" or ")", It can be written as AB (A concatenated with B), where A and B are ..

https://leetcode.com/problems/word-search/description/ Leetcode - Word Search 문제 유형 : 문자열 처리, dfs, 백트래킹 문제 난이도 : Medium 문제 Given an m x n grid of characters board and a string word, return true if word exists in the grid. The word can be constructed from letters of sequentially adjacent cells, where adjacent cells are horizontally or vertically neighboring. The same letter cell may not be used m..

https://leetcode.com/problems/isomorphic-strings/description/ Leetcode - Isomorphic Strings 문제 유형 : 해시 / 문자열 처리 문제 난이도 : Easy 문제 Given two strings s and t, determine if they are isomorphic. Two strings s and t are isomorphic if the characters in s can be replaced to get t. All occurrences of a character must be replaced with another character while preserving the order of characters. No two char..

https://leetcode.com/problems/count-subarrays-with-fixed-bounds/description/ LeetCode - Count Subarrays With Fixed Bounds 문제 유형 : 슬라이딩 윈도우 문제 난이도 : Hard 문제 You are given an integer array nums and two integers minK and maxK. A fixed-bound subarray of nums is a subarray that satisfies the following conditions: The minimum value in the subarray is equal to minK. The maximum value in the subarray is..

https://leetcode.com/problems/subarrays-with-k-different-integers/ Leetcode - Subarrays with K Different Integers 문제 유형 : 슬라이딩 윈도우 / 해시 문제 난이도 : Hard 문제 Given an integer array nums and an integer k, return the number of good subarrays of nums. A good array is an array where the number of different integers in that array is exactly k. For example, [1,2,3,1,2] has 3 different integers: 1, 2, and 3..

https://leetcode.com/problems/count-subarrays-where-max-element-appears-at-least-k-times/description/ Leetcode - Count Subarrays Where Max Element Apperas at Least K Times 문제 유형 : 슬라이딩 윈도우 문제 난이도 : Medium 문제 You are given an integer array nums and a positive integer k. Return the number of subarrays where the maximum element of nums appears at least k times in that subarray. A subarray is a cont..

https://leetcode.com/problems/length-of-longest-subarray-with-at-most-k-frequency/description/ Leetcode - Length of Longest Subarray With at Most K Frequency 문제 유형 : 슬라이딩 윈도우, 해시 문제 난이도 : Medium 문제 You are given an integer array nums and an integer k. The frequency of an element x is the number of times it occurs in an array. An array is called good if the frequency of each element in this array..

https://leetcode.com/problems/subarray-product-less-than-k/description/ Leetcode - Subarray Product Less Than K 문제 유형 : 슬라이딩 윈도우 문제 난이도 : Medium 문제 Given an array of integers nums and an integer k, return the number of contiguous subarrays where the product of all the elements in the subarray is strictly less than k. 정수 배열 nums와 정수 k가 주어진다. 전체 곱이 k보다 작은 부분배열들의 개수를 구하시오. 풀이 슬라이딩 윈도우를 이용하여 풀어주면 된다..

https://leetcode.com/problems/first-missing-positive/description/ Leetcode - First Missing Positive 문제 유형 : 배열, 정렬 문제 난이도 : Hard 문제 Given an unsorted integer array nums. Return the smallest positive integer that is not present in nums. You must implement an algorithm that runs in O(n) time and uses O(1) auxiliary space. 정렬되지 않은 정수 배열 nums가 주어집니다. nums에 없는 가장 작은 자연수를 반환하시오. 알고리즘을 O(n)의 시간과 O(1)의 ..