"use strict";
function main(input) {
  let kari = input[0].trim().split(" ");

  let a = parseInt(kari[0]);
  let b = parseInt(kari[1]);
  let c = parseInt(kari[2]);

  console.log((Math.sqrt(a)+Math.sqrt(b))<Math.sqrt(c)?"Yes":"No");
}
main(require('fs').readFileSync('/dev/stdin', 'utf8').trim().split("\n"));