<?php


    $shiki = fgets(STDIN);

    $shiki_list = explode(" ",$shiki);

    $a = $shiki_list[0];
    $b = $shiki_list[1];
    $c = $shiki_list[2];


    if(4*$a*$b<(($c-$a-$b)**2) && ($c-$a-$b)>0){
        echo "Yes\n";
    }else{
        echo "No\n";
    }



