#include <bits/stdc++.h>
using namespace std;
const long long INF = 1e18;
const long double eps = 1.0e-8;
long double mysqrtl(long double x) {
  long double a = sqrt((double)x);
  do {
    a = (a + x / a) / 2.0L;
  } while (fabsl(x - a * a) > eps);
  return a;
}
int main() {
  long long a, b, c;
  cin >> a >> b >> c;
  if (mysqrtl(a) + mysqrtl(b) < mysqrtl(c))
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
