#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N = (int) 1e6 + 7;
int n;
int a[N];
int b[N];
signed main() {
ios::sync_with_stdio(0); cin.tie(0);
//freopen ("input", "r", stdin);
cin >> n;
for (int i = 0; i < n; i++) {
cin >> a[i] >> b[i];
}
while (true) {
bool change = false;
for (int i = 0; i < n; i++) {
int j = (i + 1) % n;
int extra = a[i] - b[i];
if (extra >= 1 && a[i] >= 2) {
change = true;
a[i] -= (extra + 1) / 2 * 2;
a[j] += (extra + 1) / 2;
}
}
if (!change) {
break;
}
}
for (int i = 0; i < n; i++) {
if (a[i] != b[i]) {
cout << "No\n";
exit(0);
}
}
cout << "Yes\n";
return 0;
}
