487. Max Consecutive Ones II
Given a binary array nums, return the maximum number of consecutive 1‘s in the array if you can flip at most one 0. Example 1: Input: nums = [1,0,1,1,0] Output: 4 Explanation: – If we flip the first zero, nums becomes [1,1,1,1,0] and we have 4 consecutive ones. – If we flip the second zero, […]
905. Sort Array By Parity
Given an integer array nums, move all the even integers at the beginning of the array followed by all the odd integers. Return any array that satisfies this condition. Example 1: Input: nums = [3,1,2,4] Output: [2,4,3,1] Explanation: The outputs [4,2,3,1], [2,4,1,3], and [4,2,1,3] would also be accepted. Example 2: Input: nums = [0] Output: […]
Check If N and Its Double Exist
Given an array arr of integers, check if there exist two indices i and j such that: i != j 0 <= i, j < arr.length arr[i] == 2 * arr[j] Example 1: Input: arr = [10,2,5,3] Output: true Explanation: For i = 0 and j = 2, arr[i] == 10 == 2 * 5 […]
3. Longest Substring Without Repeating Characters
Given a string s, find the length of the longest substring without repeating characters. Example 1: Input: s = “abcabcbb” Output: 3 Explanation: The answer is “abc”, with the length of 3. Example 2: Input: s = “bbbbb” Output: 1 Explanation: The answer is “b”, with the length of 1. Example 3: Input: s = […]