def solve(n, k):
    q, x, ans = n, 1, 0
    while q > 0:
        digit = q % 10
        q //= 10
        ans += q * x
        if digit == k:
            ans += n % x + 1
        elif digit > k:
            ans += x    
        x *= 10
    return ans

r = solve(213, 1)
print(r)