Submission #3612837

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Source Code Expand

n = int(input())
k = int(input())
if k == 1:
    print("YES")
    exit()
n -= 1
flag = False
while k > 0 and n >= 3:
    if n >= 3:
        n -= 2
        k -= 1

if n >= 1:
    k -= 1
if k <= 0:
    flag = True


if flag:
    print("YES")
else:
    print("NO")

Submission Info

Judge Result