fin_name = 'input.txt'
fout_name = "output.txt"
with open (fin_name) as fin:
numbers =list(map(int, fin.readline().split(' ')))
a = numbers[0]
b = numbers[1]
c = numbers[2]
ra = c * 2
result = None
if a<ra:
result = 'No'
elif b<ra:
result = 'No'
else:
result = 'Yes'
with open (fout_name, 'w') as fout:
fout.write(str(result))