#include<iostream>
#include<algorithm>
#include<cstring>
#include<map>
#include<queue>
#include<vector>
#include<set>
#include<sstream>
using namespace std;
typedef long long ll;
const ll maxn=1e6+10;
const ll inf=0x3f3f3f3f3f3f3f3f;
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
	long double a,b,c;
	cin>>a>>b>>c;
	if(a+b+2*(long double)sqrt((long double)a*b)<c)
		cout<<"Yes"<<endl;
	else
		cout<<"No"<<endl;
	return 0;
}