#include <iostream>
#include <vector>
#include <algorithm>

int main()
{
using std::cout;
using std::cin;
using std::endl;
using std::vector;

int T;
vector<int> countVector;
int counter = 0;

cin » T;
for (int i = 0; i < T; i++) {
int n;
cin » n;
int vector1[n];
int vector2[n];
for (int i = 0; i < n; i++) {
cin » vector1[i];
}

for (int i = 0; i < n; i++) {
cin » vector2[i];
if (vector1[i] != vector2[i]) {
counter++;
}
}

countVector.push_back(counter);
counter = 0;
}

for (int i = 0; i < countVector.size(); i++) {
cout « countVector[i] « endl;
}
return 0;
}