[LeetCode] 670. Maximum Swap
You are given an integer num. You can swap two digits at most once to get the maximum valued number. Return the maximum valued number you can get. Example 1:Input: num = 2736Output: 7236Explanati
[LeetCode] 1461. Check If a String Contains All Binary Codes of Size K
Given a binary string s and an integer k. Return True if every binary code of length k is a substring of s. Otherwise, return False. Example 1:Input: s = “00110110”, k = 2Output: trueExplana
[LeetCode] 1481. Least Number of Unique Integers after K Removals
Given an array of integers arr and an integer k. Find the least number of unique integers after removing exactly k elements. Example 1:Input: arr = [5,5,4], k = 1Output: 1Explanation: Remove
[LeetCode] 1151. Minimum Swaps to Group All 1s Together
Given a binary array data, return the minimum number of swaps required to group all 1’s present in the array together in any place in the array. Example 1:Input: data = [1,0,1,0,1]Output: 1Explan
[LeetCode] 303. Range Sum Query - Immutable
Given an integer array nums, handle multiple queries of the following type:Calculate the sum of the elements of nums between indices left and right inclusive where left <= right. Implement the
[LeetCode] 1561. Maximum Number of Coins You Can Get
There are 3n piles of coins of varying size, you and your friends will take piles of coins as follows:In each step, you will choose any 3 piles of coins (not necessarily consecutive).Of your choice, A
[LeetCode] 1052. Grumpy Bookstore Owner
Today, the bookstore owner has a store open for customers.length minutes. Every minute, some number of customers (customers[i]) enter the store, and all those customers leave after the end of that mi
[LeetCode] 765. Couples Holding Hands
There are n couples sitting in 2n seats arranged in a row and want to hold hands. The people and seats are represented by an integer array row where row[i] is the ID of the person sitting in the ith s