#include <bits/stdc++.h>
#define int long long
#define lson k<<1
#define rson (k<<1)|1
#define debug cout<<666<<endl;
using namespace std;
const int N=1e6+5;
void vision()
{
	int a,b,c;
	while(cin>>a>>b>>c){
		if(a<0||c<0){
			cout<<"No\n";
		}
		else if(a==0){
			if(b==0){
				if(c>=0){
					cout<<"Yes\n";
				}
				else cout<<"No\n";
			}
			else {
				cout<<"No\n";
			}
		}
		else if(c==0){
			if(b==0){
				if(a>=0){
					cout<<"Yes\n";
				}
				else cout<<"No\n";
			}
			else {
				cout<<"No\n";
			}
		}
		else {
			b=b*b;
			if(b>4*a*c){
				cout<<"No\n";
			}
			else cout<<"Yes\n";
		}
	}
	return ;
}
signed main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	int t=1;
	// cin>>t;
	while(t--){
		vision();
	}
	return 0;
}