Problem:
Score : 100 points

Problem Statement

An elementary school student Takahashi has come to a variety store.

He has two coins, A-yen and B-yen coins (yen is the currency of Japan), and wants to buy a toy that costs C yen. Can he buy it?

Note that he lives in Takahashi Kingdom, and may have coins that do not exist in Japan.

Constraints

All input values are integers.

1 \leq A, B \leq 500

1 \leq C \leq 1000

Input

Input is given from Standard Input in the following format:

A B C

Output

If Takahashi can buy the toy, print Yes; if he cannot, print No.

Sample Input 1

50 100 120

Sample Output 1

Yes

He has 50 + 100 = 150 yen, so he can buy the 120-yen toy.

Sample Input 2

500 100 1000

Sample Output 2

No

He has 500 + 100 = 600 yen, but he cannot buy the 1000-yen toy.

Sample Input 3

19 123 143

Sample Output 3

No

There are 19-yen and 123-yen coins in Takahashi Kingdom, which are rather hard to use.

Sample Input 4

19 123 142

Sample Output 4

Yes

Solution in Ruby (2.3.3) (judge verdict: Runtime Error)

def check
  while line = STDIN.gets.chomp
    break unless line.chomp!.empty?
  end

  a,b,p = line.split ' '

  begin
    coin_a = Integer(a)
    coin_b = Integer(b)
    prod = Integer(p)
  rescue
    return false
  end

  return false unless (1<=coin_a && coin_a<=500)
  return false unless (1<=coin_b && coin_b<=500)
  return false unless (1<=prod && prod<=1000)

  return (coin_a+coin_b)>=prod
end


def main
 puts check() ? 'YES' : 'NO'
end

main()