#include <bits/stdc++.h>
using namespace std;
int main(void) {
  int n;
  int temp1, temp2;
  int i1;
  int ok;
  while (1) {
    cin >> n;
    if (n == 0) break;
    set<pair<int, int> > w;
    int sum;
    for (i1 = 0; i1 < n; i1++) {
      cin >> temp1 >> temp2;
      w.insert(make_pair(temp2, temp1));
    }
    sum = 0;
    ok = 1;
    set<pair<int, int> >::iterator it;
    for (it = w.begin(); it != w.end(); it++) {
      sum += it->second;
      if (sum > it->first) ok = -1;
    }
    if (ok == -1)
      cout << "No" << endl;
    else
      cout << "Yes" << endl;
  }
  return 0;
}
