Doubt in the question median of two sorted arrays

#1

#include
using namespace std;
int main() {
int n;
cin>>n;
int arr1[n],arr2[n],arr3[2*n];
for(int i=0;i<n;i++){
cin>>arr1[i];
}
for(int i=0;i<n;i++){
cin>>arr2[i];
}
int i=0,j=0,k=0;
while(i<n && j<n){
if(arr1[i]<arr2[j]){
arr3[k++]=arr1[i++];
}
else if(arr1[i]>arr2[j]){
arr3[k++]=arr2[j++];
}
else if(arr1[i]==arr2[j]){
arr3[k++]=arr1[i++];
arr3[k++]=arr2[j++];
}
}
while(i<n){
arr3[k++]=arr1[i++];
}
while(j<n){
arr3[k++]=arr2[j++];
}
int median=(arr3[n-1]+arr3[n])/2;
cout<<median;
return 0;
}
what is wrong in my code

#2

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