#include <bits/stdc++.h>   using namespace std;   int main() {     int a, b, c;     cin >> a;     cin >> b;     cin >> c;     int d = a + b - c;     int e = b + c - a;     int f = a + c - b;     if (d < 0 || e < 0 || f < 0 || e % 2 || d % 2 || f % 2) {       cout <<  Impossible ;       return 0;     }     cout << d / 2 <<     << e / 2 <<     << f / 2 << endl;   }   