Write a program that, given an array A[] of n numbers and another number x, determines whether or not there exist two elements in S whose sum is exactly x.
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Question: An Array of integers is given, both +ve and -ve. You need to find the two elements such that their sum is closest to zero.
For the below array, program shou...

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Given that integers are read from a data stream. Find median of elements read so for in efficient way. For simplicity assume there are no duplicates. For example, let...

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Given an unsorted array and a number n, find if there exists a pair of elements in the array whose difference is n.
Examples:
Input: arr[] = {5, 20, 3, 2, 50, 80}, n...

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Given an array of integers, replace every element with the next greatest element (greatest element on the right side) in the array. Since there is no element next to...

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Given an array of size n, the array contains numbers in range from 0 to k-1 where k is a positive integer and k <= n. Find the maximum repeating number in this arr...

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In a party of N people, only one person is known to everyone. Such a person may be present in the party, if yes, (s)he doesn’t know anyone in the party. We can...

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Given a string, find the first non-repeating character in it. For example, if the input string is “GeeksforGeeks”, then output should be ‘f...

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There are two singly linked lists in a system. By some programming error, the end node of one of the linked list got linked to the second list, forming an inverted Y...

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Given two numbers represented by two linked lists, write a function that returns sum list. The sum list is linked list representation of addition of two input numbers...

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