Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] ...

Given an array of integers, 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements that appear twi ...

Given an array containing n distinct numbers taken from 0, 1, 2, …, n, find the one that is missing from the array. ExampleNo.1Input: [3,0,1] Output: ...

Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate number must exist. ...

Given an array of integers, find out whether there are two distinct indices i and j in the array such that the absolute difference between nums[i] and ...

Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] and the ...

Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the arr ...

A peak element is an element that is greater than its neighbors. Given an input array nums, where nums[i] ≠ nums[i+1], find a peak element and return ...

You have k lists of sorted integers in ascending order. Find the smallest range that includes at least one number from each of the k lists. We define ...

Given an array A of integers, for each integer A[i] we need to choose either x = -K or x = K, and add x to A[i] (only once). After this process, we ha ...