#include <bits/stdc++.h>
long long int a, b, c;
int main() {
  std::cin >> a >> b >> c;
  long long int left = a * a + b * b + c * c - 2 * a * c - 2 * b * c;
  long long int right = 2 * a * b;
  if (left > right) {
    std::cout << "Yes" << std::endl;
  } else {
    std::cout << "No" << std::endl;
  }
}
