개발공부/LeetCode

39. Combination Sum - 쉬운설명 반복문 사용

39. Combination Sum Given an array of distinct integers candidates and a target integer target, return a list of all unique combinations of candidates where the chosen numbers sum to target. You may return the combinations in any order. The same number may be chosen from candidates an unlimited number of times. Two combinations are unique if the frequency of at least one of the chosen numbers is..

171. Excel Sheet Column Number - 쉬운설명 반복문 사용

171. Excel Sheet Column Number Given a string columnTitle that represents the column title as appear in an Excel sheet, return its corresponding column number. A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28 ... Example 1: Input: columnTitle = "A" Output: 1 Example 2: Input: columnTitle = "AB" Output: 28 Example 3: Input: columnTitle = "ZY" Output: 701 계획 문제 해결 전략 컬럼타이틀을 숫자로 바꾸어주는 문제입니다. 구현 전..

[Javascript] 13. Roman to Integer 쉬운설명 - 해시맵

13. Roman to Integer Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Symbol Value I 1 V 5 X 10 L 50 C 100 D 500 M 1000 For example, 2 is written as II in Roman numeral, just two one's added together. 12 is written as XII, which is simply X + II. The number 27 is written as XXVII, which is XX + V + II. Roman numerals are usually written largest to smallest from ..

[JavaScript]45. Jump Game II

45. Jump Game II Given an array of non-negative integers nums, you are initially positioned at the first index of the array. Each element in the array represents your maximum jump length at that position. Your goal is to reach the last index in the minimum number of jumps. You can assume that you can always reach the last index. Example 1: Input: nums = [2,3,1,1,4] Output: 2 Explanation: The min..