#include <bits/stdc++.h>
using ll = long long;
using namespace std;
template <class T>
bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T>
bool chmin(T &a, const T &b) {
  if (a > b) {
    a = b;
    return 1;
  }
  return 0;
}
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  double a, b, c;
  cin >> a >> b >> c;
  if (a + b + sqrt(2 * a * b) - c < 0) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
  return 0;
}
