a = input()
a,b = a.split(" ",2)
a,b = int(a),int(b)
c = 0
d = "0123456789"
e = [0,0,0,0,0,0,0,0,0,0]
for i in range(a):
    c = i + 1
    c = str(c)
    f = len(c)
    for j in range(f):
        g = c[j]
        for k in range(10):
            if g == d[k]:
                e[k] += 1
print(e[b])