#!/bin/python

import sys


n = int(raw_input().strip())
xF = 0
yF = 0
x = 0
y = 0
for a0 in xrange(n):
    x,y = map(int, raw_input().strip().split(' '))
    xF += abs(int(x))
    yF += abs(int(y))

if (xF/n == x and xF%n == 0) or (yF/n == y and yF%n == 0):
    print "YES"
else:
    print "NO"