#include <bits/stdc++.h>
int main() {
  double a, b, c;
  if (scanf("%lf %lf %lf", &a, &b, &c) != 3) {
  };
  if (a + b + 2 * sqrt(a * b) < c) {
    printf("Yes");
  } else {
    printf("No");
  }
  return 0;
}
