#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int A, B, C;
  cin >> A >> B >> C;
  int res = 1 << 28;
  for (int a = 0; a < A + 1; a++) {
    for (int b = 0; b < B + 1; b++) {
      for (int x = 1; x < a + b * 10 + 1; x++) {
        int y = abs(x - (a + b * 10));
        if ((A - a) + (B - b) + (y % 10) + y / 10 == C) {
          res = min(res, x);
        }
      }
    }
  }
  if (res == (1 << 28)) {
    cout << "Impossible" << '\n';
  } else {
    cout << res << '\n';
  }
  return 0;
}