int main() {
    int n;
    scanf ("%d",&n);
    n--;

    int* key = new int[n];
    int* door = new int[n];

    for(int i = 0; i < n; i++) scanf ("%d",&key[i]);

    int ans = 0;
    unordered_map<int, int> inventory;

    for(int i = 0; i < n; i++){
        int temp;
        scanf ("%d",&temp);
        inventory[key[i]]++;
        if(inventory[temp] == 0) ans++;
        else inventory[temp]--;
    }

    cout << ans;

    return 0;
}


//3
class Directory{
public:
    string name;
    Directory* parent;
    map<string, Directory*> child;

    Directory(Directory* par, string _name): parent(par), name(_name){};

    bool operator<(const Directory& other) const{
        return this->name < other.name;
    }

    bool hasDir(string dirName){
        if(child.find(dirName) != child.end()) return true;
        return false;
    }

    void mkdir(string dirName){
        if(this->hasDir(dirName)) cout << "Directory already exists\n";
        else{
            Directory* temp = new Directory(this, dirName);
            child[dirName] = temp;
        }
    }

    void ls(){
        for (auto dir : child) cout << dir.first << ' ';
        cout << '\n';
    }

    Directory* cd(string dirName){
        if (dirName == ".." && this->parent) return this->parent;
        else if(this->hasDir(dirName)) return child[dirName];
        else{
            cout << "No such directory\n";
            return this;
        }
    }

    string pwd(){
        string container;
        if(this->parent != NULL) container += this->parent->pwd();
        container += this->name;
        container += "/";
        return container;
    }
};

int main() {
    int n;
    cin >> n;

    Directory* current = new Directory(NULL, "");

    for(int i = 0; i < n; i++){
        string op;
        cin >> op;
        if(op == "mkdir"){
            string arg;
            cin >> arg;
            current->mkdir(arg);
        }
        else if(op == "ls"){
            current->ls();
        }
        else if(op == "cd"){
            string arg;
            cin >> arg;
            current = current->cd(arg);
        }
        else if(op == "pwd"){
            cout << current->pwd() << '\n';
        }
    }

    return 0;
}