C Part

n, k, x = tuple([int(x) for x in input().split()])
    a = [int(x) for x in input().split()]
    a.sort()
    j = 0
    count = 0
    for i in range(1,n):
        c = a[i]-a[i-1]
        if(c > x):
            if(c/2 <= x and k != count):
                count += 1
            else:
                j += 1
    print(j+1)