function main (s) {
	var a=s.split(" ");
	for(var i=0;i<a.length;i++)a[i]=parseInt(a[i]);
	if(a[0]+a[1]>=a[2])console.log("Yes\n");
	else console.log("No\n");
}
 
main(require('fs').readFileSync('/dev/stdin', 'utf8'));