text: #include <iostream>
  using namespace std;
  int main()
  {
      cout << "-10/3 = " << (-10 / 3) << endl;
      long long l = -2;
      cout << "val = " << (unsigned long long)l<< endl;
      unsigned int a = (1 << 31) - 7;
      unsigned int b = (1 << 31) - 3;
      cout << "div= " << (int)((a * 3 + b * 7) / 10 ) << endl;
      }