a, b, c = map(int, input().split())
def f(rest, cost):
    i = 1
    while True:
        if i > cost:
            return float('inf')
        r2 = rest + (cost - i) // 10 + (cost - i) % 10
        if r2 == c:
            return i
        i += 1
def li(i, acc):
    def lj(j, acc):
        if j > a:
            return acc
        rest = f(b - i + a - j, i * 10 + j)
        return lj(j + 1, min(acc, rest))
    if i > b:
        return acc
    return li(i + 1, lj(0, acc))
if li(0, float('inf')) == float('inf'):
    print("Impossible")
else:
    print(li(0, float('inf')))