#include <bits/stdc++.h>
using namespace std;
const long double eps = 1.0e-7;
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() {
  int a, b, c;
  cin >> a >> b >> c;
  long double aa = mysqrtl(a);
  long double bb = mysqrtl(b);
  long double cc = mysqrtl(c);
  if (aa + bb < cc) {
    printf("Yes");
  } else {
    printf("No");
  }
  return 0;
}
