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#include <iostream>
#include <vector>
#include <set>
#include <fstream>

class Rectangle {
private:
    int a1;
    int b1;
    int a2;
    int b2;
public:
    Rectangle();
    Rectangle(int a1, int b1, int a2, int b2);
    int getA1();
    int getB1();
    int getA2();
    int getB2();
    void setA1(int newA1);
    void setB1(int newB1);
    void setA2(int newA2);
    void setB2(int newB2);
    int getPerimeter();
};

Rectangle::Rectangle() {
    a1 = 0;
    b1 = 0;
    a2 = 0;
    b2 = 0;
}

Rectangle::Rectangle(int a1, int b1, int a2, int b2) {
    this->b1 = b1;
    this->a1 = a1;
    this->a2 = a2;
    this->b2 = b2;
}

int Rectangle::getA1() {
    return a1;
}

int Rectangle::getB1() {
    return b1;
}

int Rectangle::getA2() {
    return a2;
}

int Rectangle::getB2() {
    return b2;
}

void Rectangle::setA1(int newA1) {
    a1 = newA1;
}

void Rectangle::setB1(int newB1) {
    b1 = newB1;
}

void Rectangle::setA2(int newA2) {
    a2 = newA2;
}

void Rectangle::setB2(int newB2) {
    b2 = newB2;
}

int Rectangle::getPerimeter() {
    return 2 * (abs(a1 - a2) + abs(b1 - b2));
}

int main() {
    std::ifstream fin("in.txt");
    std::ofstream fout("out.txt");
    int n;
    fin >> n;
    std::vector <Rectangle> r;
    for (int i = 0; i < n; i++) {
        int a1, b1, a2, b2;
        fin >> a1 >> b1 >> a2 >> b2;
        r.push_back(Rectangle(a1, b1, a2, b2));
    }
    std::set <int> s;
    for (int i = 0; i < n; i++) {
        s.insert(r[i].getPerimeter());
    }
    fout << s.size();
    fin.close();
    fout.close();
    return 0;
}

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