#!/bin/python3

import sys

xs = []
ys = []
others = []

n = int(input().strip())
for a0 in range(n):
    x,y = input().strip().split(' ')
    x,y = [int(x),int(y)]
    t = [x, y]
    
    if(x == 0 and y == 0):
        xs.append(t)
        ys.append(t)
    elif(x == 0 and y!= 0):
        ys.append(t)
    elif(x != 0 and y == 0):
        xs.append(t)
    else:
        others.append(t)



if(len(others) > 0):
    print("NO")

elif(len(xs) > 0 and len(ys) <= 1):
    if(len(ys) > 1):
        print("NO")
    elif(len(ys) == 1):
        if(ys[0][1] == 0):
            print("YES")
        else:
            print("NO")
    else:
        print("YES")
elif(len(ys) > 0 and len(xs) <= 1):
    if(len(xs) > 1):
        print("NO")
    elif( len(xs) == 1 ):
        if( xs[0][0] == 0 ):
            print("YES")
        else:
            print("NO")
    else:
        print("YES")