#include <bits/stdc++.h>
using namespace std;
int main() {
  long long a, b, c;
  cin >> a >> b >> c;
  if ((c - a - b) > 0) {
    if ((a * a + b * b + c * c - 2 * a * c - 2 * b * c + 2 * a * b -
         4 * a * b) > 0)
      cout << "Yes" << endl;
    else
      cout << "No" << endl;
  } else {
    if ((a * a + b * b + c * c - 2 * a * c - 2 * b * c + 2 * a * b -
         4 * a * b) < 0)
      cout << "Yes" << endl;
    else
      cout << "No" << endl;
  }
  return 0;
}
