#include <iostream>
using namespace std;
int a[1<<20], b[1<<20];
int main(){
ios_base::sync_with_stdio(false); cin.tie(NULL);
int n, ch = 1, ans1 = 0, ans2 = 0, mn = 0;
cin>>n;
for (int i=0;i<n;i++)
cin>>a[i]>>b[i], mn = max(mn, b[i]);
while (ch){
ch = 0;
for (int i=0;i<n;i++){
int k = max(0, a[i] - b[i]) >> 1;
ch += !!k;
a[(i + 1) % n] += k;
a[i] -= k<<1;
}
}
for (int i=0;i<n;i++){
if (a[i] == b[i])
ans1++;
else if (a[i] == b[i] + 1)
ans2++;
}
if (ans1 == n or (ans2 == n and mn > 0))
cout<<"Yes\n";
else
cout<<"No\n";
}
