const main = function(arg) {
    var input = arg.trim().split(" ");
    var a = parseInt(input[0])
    var b = parseInt(input[1])
    var c = parseInt(input[2])
    
    if(Math.sqrt(a) + Math.sqrt(b) < Math.sqrt(c)){
        console.log("Yes")
    }else {
        console.log("No")
    }
    
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));  