#include <bits/stdc++.h>
using namespace std;
struct island {
  int bridge;
  int treasure;
};
bool operator<(island i1, island i2) { return i1.treasure < i2.treasure; }
int main() {
  int input, value;
  bool flag;
  while (1) {
    cin >> input;
    if (input == 0) {
      break;
    }
    island table[input];
    for (int i = 0; i < input; i++) {
      cin >> table[i].treasure >> table[i].bridge;
    }
    sort(table, table + input);
    value = 0;
    flag = true;
    for (int i = 0; i < input; i++) {
      value += table[i].treasure;
      if (value >= table[i].bridge) {
        flag = false;
        break;
      }
    }
    if (flag) {
      cout << "Yes" << endl;
    } else {
      cout << "No" << endl;
    }
  }
  return 0;
}
