#include <bits/stdc++.h>
using namespace std;
void process(){
int n; cin >> n;
vector <int> A(n), B(n);
for (int i = 0; i < n; ++ i)
cin >> A[i] >> B[i];
while (true){
bool ok = false;
for (int i = 0; i < n; ++ i){
if (A[i] > B[i] + 1){
ok = true;
int to = (A[i] - B[i]) / 2;
A[i] -= to * 2;
A[(i + 1) % n] += to;
}
}
if (!ok) break;
}
for (int i = 0; i < n; ++ i) if (A[i] < B[i]){
cout << "No" << "\n";
return;
}
int eq = 0, gr = 0, ca = 0;
for (int i = 0; i < n; ++ i){
eq |= (A[i] == B[i]);
gr |= (A[i] > B[i]);
ca |= (A[i] > 1);
}
if ((!eq && ca) || !gr) cout << "Yes" << "\n";
else cout << "No" << "\n";
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
process();
return 0;
}
