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