#include <iostream>
using namespace std;
typedef long long ll;
const int MAXN = 1e6;
int n;
ll a[MAXN + 5], b[MAXN + 5];
bool isEqual() {
for (int i = 0; i < n; i++) {
if (a[i] != b[i]) return 0;
}
return 1;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n;
for (int i = 0; i < n; i++) {
cin >> a[i] >> b[i];
}
for (int i = 0; i < 100; i++) {
for (int j = 0; j < n; j++) {
int k = (j + 1) % n;
if (a[j] > b[j]) {
ll x = (a[j] - b[j]) / 2;
a[j] -= (2 * x);
a[k] += x;
}
}
}
cout << (isEqual() ? "Yes" : "No") << '\n';
return 0;
}
