def main():
    from sys import stdin, setrecursionlimit
    #setrecursionlimit(10**6)
    r = stdin.readline()[:-1]
    #n = int(stdin.readline()[:-1])   
    #r = [stdin.readline() for i in range(n)]
    #t = [int(stdin.readline()) for i in range(n)]
    
    #'Yes', 'No', 'YES', 'NO', ':(', 'Yay!'
    #res = 0
    a, b, c = map(int, r.split())
    if a+b > c:
        print('No')
    else:
        print('Yes')
    #print()

if __name__ == '__main__':
    main()

