n, k = map(int, input().split())

print((n-k+1) - n//k) n, k = map(int, input().split()) n map(int, input().split()) map int input().split() ().split () input split k print((n-k+1) - n//k) print (n-k+1) - n//k n-k+1 n-k n k 1 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())

print((n-k+1) - n//k)