function Main (input) {
  input = input.split("\n")[0].split(" ").map(Number);
  var a = input[0];
  var b = input[1];
  var c = input[2];
  if (Math.sqrt(a)+Math.sqrt(b) < Math.sqrt(c)) {
    console.log("Yes");
  }
  else {
    console.log("No");
  }
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));