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345. Reverse Vowels of a String Given a string s, reverse only all the vowels in the string and return it.The vowels are 'a', 'e', 'i', 'o', and 'u', and they can appear in both lower and upper cases, more than once. Example 1:Input: s = "IceCreAm"Output: "AceCreIm"Explanation:The vowels in s are ['I', 'e', 'e', 'A']. On reversing the vowels, s becomes "AceCreIm".Example 2:Input: s = "leetcode"O..

class Solution: def canPlaceFlowers(self, flowerbed: List[int], n: int) -> bool: new_flowerbed = [0] + flowerbed + [0] for i in range(1, len(new_flowerbed)-1): # skip first & last if new_flowerbed[i] == 0 and new_flowerbed[i-1] == 0 and new_flowerbed[i+1] == 0: new_flowerbed[i] = 1 n -= 1 #if n == 0: # re..

class Solution: def kidsWithCandies(self, candies: List[int], extraCandies: int) -> List[bool]: ans = [] for candy in candies: now = candy + extraCandies b = True for candy2 in candies: if now 1431. Kids With the Greatest Number of Candies There are n kids with candies. You are given an integer array candies, where each candies[i] ..

1071. Greatest Common Divisor of Strings For two strings s and t, we say "t divides s" if and only if s = t + t + t + ... + t + t (i.e., t is concatenated with itself one or more times).Given two strings str1 and str2, return the largest string x such that x divides both str1 and str2. Example 1:Input: str1 = "ABCABC", str2 = "ABC"Output: "ABC"Example 2:Input: str1 = "ABABAB", str2 = "ABAB"Outpu..

1768. Merge Strings Alternately You are given two strings word1 and word2. Merge the strings by adding letters in alternating order, starting with word1. If a string is longer than the other, append the additional letters onto the end of the merged string.Return the merged string. Example 1:Input: word1 = "abc", word2 = "pqr"Output: "apbqcr"Explanation: The merged string will be merged as so:wor..

901. Online Stock Span Design an algorithm that collects daily price quotes for some stock and returns the span of that stock's price for the current day.The span of the stock's price in one day is the maximum number of consecutive days (starting from that day and going backward) for which the stock price was less than or equal to the price of that day.For example, if the prices of the stock in ..

739. Daily Temperatures Given an array of integers temperatures represents the daily temperatures, return an array answer such that answer[i] is the number of days you have to wait after the ith day to get a warmer temperature. If there is no future day for which this is possible, keep answer[i] == 0 instead. Example 1:Input: temperatures = [73,74,75,71,69,72,76,73]Output: [1,1,4,2,1,1,0,0]Examp..

452. Minimum Number of Arrows to Burst Balloons There are some spherical balloons taped onto a flat wall that represents the XY-plane. The balloons are represented as a 2D integer array points where points[i] = [xstart, xend] denotes a balloon whose horizontal diameter stretches between xstart and xend. You do not know the exact y-coordinates of the balloons.Arrows can be shot up directly vertic..

435. Non-overlapping Intervals Given an array of intervals intervals where intervals[i] = [starti, endi], return the minimum number of intervals you need to remove to make the rest of the intervals non-overlapping.Note that intervals which only touch at a point are non-overlapping. For example, [1, 2] and [2, 3] are non-overlapping. Example 1:Input: intervals = [[1,2],[2,3],[3,4],[1,3]]Output: 1..

1268. Search Suggestions System You are given an array of strings products and a string searchWord.Design a system that suggests at most three product names from products after each character of searchWord is typed. Suggested products should have common prefix with searchWord. If there are more than three products with a common prefix return the three lexicographically minimums products.Return a..