#include <bits/stdc++.h>
int main() {
  unsigned int a, b, c;
  std::cin >> a >> b >> c;
  if (a > 0 && b > 0 && c > 0) {
    if ((sqrt(a) + sqrt(b)) < sqrt(c))
      std::cout << "Yes";
    else if ((sqrt(a) + sqrt(b)) >= sqrt(c))
      std::cout << "No";
    return 0;
  }
}
