#include <iostream>
using namespace std;
int main()
{
float a, b, c, srednia, suma;
cout << "\n";
cin >> a >> b >> c;
suma = a + b + c;
srednia = suma / 3;
cout << "Suma wynosi: " << suma << "\n";
cout << "Srednia wynosi: " << srednia;
return 0;
}
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