yo

# -*- coding: utf-8 -*-
"""
Created on Thu Mar 26 00:25:34 2020

@author: Sajid
"""

import operator
a=[]
b=[]
c=[]
d=[]
mark=[]
n=int(input())
for i in range (n):
    x=float(input())
    a.append(x)
    x=float(input())
    b.append(x)
    x=float(input())
    c.append(x)
    x=float(input())
    d.append(x)
    mark.append(0)
    print('yo')

for i in range (n):
    for j in range (n):
        if a[i]<a[j] and b[i]<b[j] and c[i]>c[j] and d[i]>d[j]:
            mark[j]=mark[j]+1

ans=0
for i in range (n):
    if mark[i]%2 == 0:
        ans=ans+1
print(ans)