#include <bits/stdc++.h>
using namespace std;
int main() {
  int64_t a, b, c;
  cin >> a >> b >> c;
  if (c - a - b < 0) {
    cout << "No" << endl;
  } else {
    if (2 * c * (a + b) < c * c + a * a + b * b) {
      cout << "Yes" << endl;
    } else {
      cout << "No" << endl;
    }
  }
}
