#include <bits/stdc++.h>
int main() {
  int a = 0;
  int b = 0;
  int c = 0;
  double ab = 0;
  double cc = 0;
  scanf("%d%d%d", &a, &b, &c);
  ab += sqrt(a) + sqrt(b);
  cc += sqrt(c);
  if (ab < cc)
    printf("Yes\n");
  else
    printf("No\n");
  return 0;
}
