#include <bits/stdc++.h>
#define ll long long
#define inf 0x3f3f3f3f
#define pll pair<ll, ll>
using namespace std;
const int mod = 1e9 + 7;
const int N = 2e5 + 7;
ll n, m;
void Z()
{
    int a, b ,c;
    while (cin >> a)
    {
        cin >> b >> c;
        bool flag = 0;
        
        if (a < 0)
        {
            cout << "No" << "\n";
        }
        else if (a == 0)
        {
            if (b == 0 && c >= 0)
            {
                cout << "Yes" << "\n";
            }
            else
            {
                cout << "No" << "\n";
            }
        }
        else if (a > 0)
        {
            if (b * b - 4 * a * c <= 0)
            {
                cout << "Yes" << "\n";
            }
            else
            {
                cout << "No" << "\n";
            }
        }
       
    }
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
    //cin >> t;
    while (t--)
    {
        Z();
    }
    return 0;
}