Given two strings s1 and s2, write a function to return true if s2 contains the permutation of s1. In other words, one of the first string’s permutati ...

Given a binary array, find the maximum length of a contiguous subarray with equal number of 0 and 1. ExampleNo.1Input: [0,1] Output: 2 Explanation: [0 ...

Given a string, sort it in decreasing order based on the frequency of characters. ExampleNo.1Input:“tree” Output:“eert” Explanation:‘e’ appears twice ...

You are given an integer array heights representing the heights of buildings, some bricks, and some ladders. You start your journey from building 0 an ...

Given an array of integers target. From a starting array, A consisting of all 1’s, you may perform the following procedure: let x be the sum of all e ...

With respect to a given puzzle string, a word is valid if both the following conditions are satisfied: word contains the first letter of puzzle. For ...

Your country has an infinite number of lakes. Initially, all the lakes are empty, but when it rains over the nth lake, the nth lake becomes full of wa ...

Given a list of daily temperatures T, return a list such that, for each day in the input, tells you how many days you would have to wait until a warme ...

Given the array prices where prices[i] is the price of the ith item in a shop. There is a special discount for items in the shop, if you buy the ith i ...

Given the string s, return the size of the longest substring containing each vowel an even number of times. That is, ‘a’, ‘e’, ‘i’, ‘o’, and ‘u’ must ...