题解 | #相差不超过k的最多数#

n, k = map(int, input().split())
a = list(map(int, input().split()))
a.sort()
begin = 0
end = 0
num = 0
num_max = 0

while end < n:
    if a[end] - a[begin] <= k:
        end += 1
        num += 1
        if num > num_max:
            num_max = num
    else:
        begin += 1
        num -= 1
print(num_max)