---

Lỗi biên dịch:

Main.cc: In function ‘long long int countPairs(long long int, long long int)’:
Main.cc:51:5: error: expected ‘}’ at end of input
     }
     ^
Main.cc:51:5: error: expected ‘}’ at end of input
Main.cc:51:5: warning: no return statement in function returning non-void [-Wreturn-type]