Find Missing and Repeating Numbers
Hard Problems: Merge & Intervals DSA practice problem on Onlearn.
Difficulty: hard.
Topics: Find the repeating and missing numbers in an array of size N where numbers are from 1 to N, one appears twice, and one is missing, Arrays, Linear Search, Hashing, Frequency Counting, Mathematical Algorithms, Basic Arithmetic, XOR, Bitwise Operations, Time Complexity, Space Complexity, Loops, Conditional Statements, bit manipulation, complexity analysis, brute force, mathematical concepts, frequency counting, array traversal, Hashing with Arrays, Algebraic Approach, Bitwise XOR.
Problem: Find the Repeating and Missing Numbers Problem Statement You are given a read only array of N integers. The values in the array are also in the range [1, N] (inclusive). Each integer appears exactly once, except for one number A which appears twice, and another number B which is missing from the array. Your task is to find these two numbers, A (the repeating number) and B (the missing number). Input Specification The input consists of a single line containing N integers, representing the array array[]. Output Specification Output two integers, the repeating number A and the missing number B, in the format {A, B}. Constraints The array contains N integers. Each integer in the array is in the range [1, N]. Sample Test Cases Example 1: Input: array[] = {3, 1, 2, 5, 3} Output: {3, 4} Explanation: The number 3 appears twice, and the number 4 is missing from the range [1, 5]. Example 2: Input: array[] = {3, 1, 2, 5, 4, 6, 7, 5} Output: {5, 8} Explanation: The number 5 appears twice, and the number 8 is missing from the range [1, 8].