"use strict"
function main(arg) {
	let a = arg.split(' ');

	let x = Math.sqrt(a[0]);;
	let y = Math.sqrt(a[1]);
	let z = Math.sqrt(a[2]);

if((x + y) < z ){
		console.log('Yes');
}
else
{
		console.log('No');
	
}



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