Y = int(input()) L = int(input()) rota = 0 gost = 0 if Y > 0: if X != 0: rota += 1 elif Y == 0: if X != 0: rota += 1 else: if X == 0: rota += 2 else: rota += 2 if X % L == 0: gost += abs(X // L) else: gost += abs(X // L) + 1 if Y % L == 0: gost += abs(Y //L) else: gost += abs(Y //L) + 1 print(rota+gost)