#include <bits/stdc++.h>
using intl = long long;
using ld = long double;
using namespace std;
const intl INF = 1e9;
const intl MOD = 1e9 + 7;
void fp(bool flag) {
  if (flag)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
int main() {
  intl a;
  cin >> a;
  intl b;
  cin >> b;
  intl c;
  cin >> c;
  ld e = 1.0e-14;
  fp((sqrtl(a) + sqrtl(b) + e < sqrtl(c)));
  return 0;
}
