N,K = map(int,input().split())

if K < 2:
  print(0)
else:
  print(N-K) N,K = map(int,input().split()) N map(int,input().split()) map int input().split() ().split () input split K if K < 2:
  print(0)
else:
  print(N-K) K < 2 K 2 print(0) print 0 print(N-K) print N-K N K N,K = map(int,input().split()) map(int,input().split()) N K = map(int,input().split()) map(int,input().split()) K
N,K = map(int,input().split())

if K < 2:
  print(0)
else:
  print(N-K)