#include <bits/stdc++.h>

using Int = int64_t;

void Solve() {
  Int n;
  std::cin >> n;
  std::vector<Int> a(n);
  Int positive = 0;
  Int negative = 0;
  Int positive_max = 0;
  Int negative_max = 0;
  for (Int i = 0; i < n; ++i) {
    std::cin >> a[i];
    if (0 < a[i]) {
      positive += a[i];
      positive_max = std::max(positive_max, a[i]);
    } else if (a[i] < 0) {
      negative += -a[i];
      negative_max = std::max(negative_max, -a[i]);
    }
  }

  if (negative - negative_max <= positive_max &&
      positive - positive_max <= negative_max) {
    std::cout << "Yes\n";
  } else {
    std::cout << "No\n";
  }
}

int main() {
  std::ios::sync_with_stdio(false);
  std::cin.tie(nullptr);

  Solve();
}