'''
Don't Copy This Code, CopyRight . [email protected] © 2022-2023 :)
'''
import sys, threading
sys.setrecursionlimit(2147483647)
input = sys.stdin.readline
def print(*args, end='\n', sep=' ') -> None:
sys.stdout.write(sep.join(map(str, args)) + end)
def Solve():
n = int(input())
ax, ay = list(map(int, input().split()))
bx, by = list(map(int, input().split()))
cx, cy = list(map(int, input().split()))
if bx < ax and by < ay:
if cx > ax or cy > ay:
print("NO")
else:
print("YES")
elif bx < ax and by > ay:
if cx > ax or cy < ay:
print("NO")
else:
print("YES")
elif bx > ax and by < ay:
if cx < ax or cy > ay:
print("NO")
else:
print("YES")
else:
if cx < ax or cy < ay:
print("NO")
else:
print("YES")
if(__name__ == "__main__"):
threading.stack_size(10**8)
threading.Thread(target=Solve).start()#include<bits/stdc++.h>
using namespace std;
int main(){
int n;
cin>>n;
int ax, ay;
cin>>ax>>ay;
ax--;
ay--;
int bx, by;
cin>>bx>>by;
bx--;
by--;
int cx, cy;
cin>>cx>>cy;
cx--;
cy--;
int x=ax-bx, y=ay-by, z=ax-cx, w=ay-cy;
if (x*z>0&&y*w>0){
cout<<"YES";
}
else{
cout<<"NO";
}
return 0;
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