function main(input) {
    const args = input.split(' ');
    const a = parseInt(args[0], 10);
    const b = parseInt(args[1], 10);
  	const c = parseInt(args[2], 10);

    if (2*Math.sqrt(a*b)<(c-a-b)) {
        console.log('Yes');
    } else {
        console.log('No');
    }
}

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