Mã chấm: 269560

Main.cc: In function ‘long long unsigned int Mu(int)’:
Main.cc:23:20: error: ambiguating new declaration of ‘long long unsigned int Mu(int)’
 unsigned long long Mu(int i)
                    ^~
Main.cc:5:6: note: old declaration ‘long int Mu(int)’
 long Mu(int);
      ^~