'use strict';

function main(input) {
  const i = input.split(' ').map((x) => x | 0);

  const a = Math.sqrt(i[0]);
  const b = Math.sqrt(i[1]);
  const c = Math.sqrt(i[2]);

  const ans = a + b < c ? 'Yes' : 'No';
  console.log(ans);
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));
