#include <bits/stdc++.h>
using namespace std;
 
int findMissing(int array1[], int array2[], int s1, int s2)
{
    int result = 0;
    for (int i=0; i<s1; i++)
       result = result^array1[i];
    for (int i=0; i<s2; i++)
       result = result^array2[i];
 
    return result;
}
int main()
{
    int array1[] = {3, 1, 5, 7, 9};
    int array2[] = {3, 7, 5, 9};
     int mn;
     int s1 = sizeof(array1) / sizeof(array1[0]);
    int s2 = sizeof(array2) / sizeof(array2[0]);
        if (s1 != s2-1 && s2 != s1-1)
    {
        cout << "Invalid Input";
        return 0;
    }
    
    cout << "Original arrays: ";
    
    cout << " First array: ";
    for (int i=0; i < s1; i++) 
    cout << array1[i] <<" ";
    
    cout << " Second array: ";
    for (int i=0; i < s2; i++) 
    cout << array2[i] <<" ";
    
    mn = findMissing(array1, array2, s1, s2);
    cout <<" Missing number: " << mn;
    return 0; 
}