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  1. #include <iostream>
  2. #include <cmath>
  3.   using namespace std;
  4.  
  5. int main() {
  6.   int b1, b2, b3, pas, need; 
  7.   bool f;
  8.   cin >> b1 >> b2 >> b3;
  9.   need = (b1 + b2 + b3)/3;
  10.   pas = (abs(b1 - need) + abs(b2 - need) + abs(b3 - need)) / 2;
  11.   f = (b1 + b2 + b3) % 3;
  12.   (f == 1) and cout << "IMPOSSIBLE";
  13.   (f == 0) and cout << pas;
  14.   return 0;
  15. }
Success #stdin #stdout 0s 15232KB
comments (?)
stdin 
30 9 74
stdout 
IMPOSSIBLE
https://ideone.com/XqOdJj
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
secret

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