#include

#include

#include

using namespace std;

vector missing$($const vector& arr, int N$)\{$

vector missing$\_$numbers;

vector present$($N $+1,$ false$)$; $//$ Initialize a boolean vector to mark presence of numbers

$//$ Mark numbers as present

for $($int num : arr$)\{$

present$[$num$]=$ true;

$\}$

$//$ Find missing numbers

for $($int i $=1$; i $<=$ N; $++$i$)\{$

if $(!$present$[$i$])\{$

missing$\_$numbers.push$\_$back$($i$)$;

$\}$

$\}$

return missing$\_$numbers;

$\}$

int main$()\{$

int N;

cout $<<$ "Enter the value of N: $"$;

cin $>>$ N;

cout $<<$ "Enter a series of integers from $1$ to N $($separated by spaces$)$: $"$;

vector arr$($N$)$;

for $($int i $=0$; i $<$ N; $++$i$)\{$

cin $>>$ arr$[$i$]$;

$\}$

vector missing$\_$numbers $=$ missing$($arr$,$ N$)$;

if $($missing$\_$numbers.empty$())\{$

cout $<<"$No numbers are missing." $<<$ endl;

$\}$

else $\{$

cout $<<$ "The missing numbers are: $"$;

for $($int num : missing$\_$numbers$)\{$

cout $<<$ num $<<""$;

$\}$

cout $<<$ endl;

$\}$

return $0$;

$\}$

Help have an output like this :

Enter the value of N: $10$

Enter a series of integers from $1$ to N $($separated by spaces$)$: $135710$

The missing numbers are: $24689$