#include <bits/stdc++.h>
using namespace std;
const int64_t INF = (1LL << 60);
const long double pi = acosl((long double)1);
const int64_t mod = 1000000007;
const int dx[4] = {0, 1, 0, -1};
const int dy[4] = {1, 0, -1, 0};
const int ddx[8] = {1, 0, -1, -1, -1, 0, 1, 1};
const int ddy[8] = {1, 1, 1, 0, -1, -1, -1, 0};
bool solve() {
  long double a, b, c;
  cin >> a >> b >> c;
  a = sqrtl(a);
  b = sqrtl(b);
  c = sqrtl(c);
  if (a + b < c)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return false;
}
signed main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  cout << fixed;
  cout << setprecision(30);
  solve();
}
