#include <iostream.h>

int main() {

int c, d, e, f;

// The values of c and d have will not effect the 
//   output of this program.  Verify this, by changing 
//   the values and compiling and running the program.    
c = 123;
d = 931;

e = (++d - c--);
f = (++c - d--);

cout << e+f << endl;

}