#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) begin(v),end(v)
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
using ll = long long;
using pii = pair<int, int>;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 1000000007;
constexpr bool debug = false;
//---------------------------------//

int main() {
	int A, B, C;
	cin >> A >> B >> C;
	FOR(i, 1, A + B * 10 + 1) {
		REP(j, A + 1) REP(k, B + 1) {
			int cur = j + k * 10;
			if (cur < i) continue;
			int oturi = cur - i;
			int cnt = A - j + B - k + oturi % 10 + oturi / 10;
			if (cnt == C) {
				cout << i << endl;
				return 0;
			}
		}
	}
	puts("Impossible");
}