#include<bits/stdc++.h>
#define ll long long
#define co cout<<
using namespace std;
// stuff
void solve(){
ll n;
cin>>n;
pair<ll,ll>arr[n+5];
for(int i=0;i<n;i++) cin>>arr[i].first>>arr[i].second;
for(int i=0;i<100;i++){
for(int j=0;j<n;j++){
if(arr[j].first>arr[j].second){
ll diff=arr[j].first-arr[j].second;
if(diff%2) diff++;
if(diff>arr[j].first) continue;
arr[j].first-=diff;
arr[(j+1)%n].first+=diff/2;
}
}
}
for(int i=0;i<n;i++){
if(arr[i].first!=arr[i].second){
co "No";
return;
}
}
co "Yes";
}
int main(){
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int _=1;
// cin>>_;
while(_--) solve();
}
