import std.stdio, std.conv, std.string, std.algorithm, std.math, std.array, std.container;

bool solve() {
  double[] abc = readln.chomp.split.to!(double[]);
  return sqrt(abc[0])+sqrt(abc[1]) < sqrt(abc[2]);
}

void main() {
  if(solve) writeln("Yes");
  else writeln("No");
}

