import std.stdio;
import std.math;

void main() {
	real a, b, c;

	readf(" %s %s %s", &a, &b, &c);

	a = sqrt(a);
	b = sqrt(b);
	c = sqrt(c);

	if (b > a) {
		auto t = a;
		a = b;
		b = t;
	}
	if (b < c - a) {
		writeln("Yes");
	} else {
		writeln("No");
	}
}
