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