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  1. www.geeksforgeeks.org › find-the-missing-numberFind the Missing Number - GeeksforGeeks

    Jun 19, 2024 · The sum of the first N natural numbers is given by the formula N * (N + 1) / 2. Compute this sum and subtract the sum of all elements in the array from it to get the missing number. Steps: Calculate the sum of the first N natural numbers using the formula: total_sum = N * (N + 1) / 2.

  2. www.sanfoundry.com › c-program-missing-numbers-arrayC Program to Find Missing Numbers in Array - Sanfoundry

    C Program to Find Missing Numbers in Array. This C Program identifies missing numbers in a given array. Here is source code of the C Program to identify missing numbers in a given array. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

  3. www.codevscolor.com › c-find-missing-number-arrayC program to find the missing number in an array - CodeVsColor

    In this post, we will learn how to find the missing number in an array. The array will hold all numbers from 1 to n with one number missed. Our program will print the missing number. For example, if the array is [1, 2, 3, 4, 5, 7], the missing number is 6. We can have the array elements in any order.

  4. stackoverflow.com › questions › 2113795Quickest way to find missing number in an array of numbers

    Jan 22, 2010 · Below is the solution for finding all the missing numbers from a given array: public class FindMissingNumbers { /** * The function prints all the missing numbers from "n" consecutive numbers. * The number of missing numbers is not given and all the numbers in the * given array are assumed to be unique.

  5. www.geeksforgeeks.org › find-a-repeating-and-aFind the missing and repeating number - GeeksforGeeks

    Apr 13, 2024 · One number from set {1, 2, …n} is missing and one number occurs twice in the array. Find these two numbers. Examples: Input: arr [] = {3, 1, 3} Output: Missing = 2, Repeating = 3. Explanation: In the array, 2 is missing and 3 occurs twice. Input: arr [] = {4, 3, 6, 2, 1, 1} Output: Missing = 5, Repeating = 1.

  6. www.w3resource.com › c-programming-exercises › arrayC Program: Find the missing number from a given array ...

    Jun 28, 2024 · To solve the problem of finding the missing number in a given array of unique integers, you can implement a C program that utilizes mathematical formulas. Calculate the expected sum of the sequence up to the length of the array, then subtract the sum of the array's elements to find the missing number.

  7. www.techiedelight.com › find-missing-number-arrayFind the missing number in an array | Techie Delight

    Sep 5, 2021 · Find the missing number in an array. Given an array of n-1 distinct integers in the range of 1 to n, find the missing number in it in linear time. For example, consider array {1, 2, 3, 4, 5, 7, 8, 9, 10} whose elements are distinct and within the range of 1 to 10. The missing number is 6.