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