#include <bits/stdc++.h>
int main(void) {
  long long a, b, c;
  scanf("%ld %ld %ld", &a, &b, &c);
  if (2 * sqrtl(a * b) < c - a - b) {
    printf("Yes");
  } else {
    printf("No");
  }
  return 0;
}
