642 B | 642 chars
import sys
from math import sqrt, pi, sin, factorial
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = " " : [*map(int,inp().split(x))]
mfi = lambda x = " " : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
n, k = mii()
l = mii()
ans = 0
crt = k
for i in l:
if i != crt:
crt = k
if i == crt:
crt -= 1
else:
crt = k
if crt == 0:
ans += 1
crt = k
if crt == 0:
ans += 1
return ans
if __name__ == "__main__":
tc = ii()
for t in range(1, tc+1):
d = solve()
p(f"Case #{t}: {d}")