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question_02.cpp
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question_02.cpp
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/*
==> Missing number in array <==
Question Link:- https://practice.geeksforgeeks.org/problems/missing-number-in-array1416/1?page=1&difficulty[]=0&category[]=Arrays&sortBy=submissions
Given an array of size N-1 such that it only contains distinct integers
in the range of 1 to N. Find the missing element.
Example 1:
Input:
N = 5
A[] = {1,2,3,5}
Output: 4
Example 2:
Input:
N = 10
A[] = {6,1,2,8,3,4,7,10,5}
Output: 9
*/
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int MissingNumber(vector<int>& array, int n) {
sort(array.begin(), array.end());
for ( int i = 0; i < n; i++ ) if ( array[i] != i+1 ) return i+1;
return n;
}
int main () {
vector<int> array = {1,2,3,5};
cout << MissingNumber(array, 4) << endl;
return 0;
}